diff --git a/COPYING b/COPYING
index 2a000655e..e60008693 100644
--- a/COPYING
+++ b/COPYING
@@ -1,7 +1,7 @@
                     GNU GENERAL PUBLIC LICENSE
                        Version 3, 29 June 2007
 
- Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
diff --git a/README_ELPA b/README_ELPA
index 7640a4498..73447bcd9 100644
--- a/README_ELPA
+++ b/README_ELPA
@@ -10,7 +10,7 @@ This distribution contains an ELPA packaged version of Org.
 "ELPA" stands for the "Emacs Lisp Package Archive".
 
 The GNU ELPA is at:
-  http://elpa.gnu.org
+  https://elpa.gnu.org
 
 It contains the org-*.tar package, containing only the org files
 that are also part of GNU Emacs.
diff --git a/contrib/lisp/ob-eukleides.el b/contrib/lisp/ob-eukleides.el
index b1cc91b64..be3f1fd1c 100644
--- a/contrib/lisp/ob-eukleides.el
+++ b/contrib/lisp/ob-eukleides.el
@@ -26,7 +26,7 @@
 ;; Org-Babel support for evaluating eukleides script.
 ;;
 ;; Inspired by Ian Yang's org-export-blocks-format-eukleides
-;; http://www.emacswiki.org/emacs/org-export-blocks-format-eukleides.el
+;; https://www.emacswiki.org/emacs/org-export-blocks-format-eukleides.el
 
 ;;; Requirements:
 
diff --git a/contrib/lisp/ob-smiles.el b/contrib/lisp/ob-smiles.el
index 5a0fbf61a..9b1ac6840 100644
--- a/contrib/lisp/ob-smiles.el
+++ b/contrib/lisp/ob-smiles.el
@@ -8,7 +8,7 @@
 ;;; Commentary:
 
 ;;; I copy code from:
-;;; http://kitchingroup.cheme.cmu.edu/blog/2016/03/26/A-molecule-link-for-org-mode
+;;; https://kitchingroup.cheme.cmu.edu/blog/2016/03/26/A-molecule-link-for-org-mode
 
 ;; Author: John Kitchin [jkitchin@andrew.cmu.edu]
 ;; Maintainer: stardiviner [numbchild@gmail.com]
diff --git a/contrib/lisp/ob-spice.el b/contrib/lisp/ob-spice.el
index 3139d0eba..e8ea87af5 100644
--- a/contrib/lisp/ob-spice.el
+++ b/contrib/lisp/ob-spice.el
@@ -5,7 +5,7 @@
 ;; Maintainer: stardiviner (numbchild@gmail.com)
 ;; Version: 0.4
 ;; Package-Requires: ((spice-mode "0.0.1") (org "8"))
-;; Homepage: http://tiagoweber.github.io
+;; Homepage: https://tiagoweber.github.io
 
 ;; License: GPL v3, or any later version
 ;;
@@ -25,7 +25,7 @@
 ;;; Commentary:
 
 ;; Org-Babel support for evaluating spice script.
-;; Inspired by Ian Yang's org-export-blocks-format-plantuml (http://www.emacswiki.org/emacs/org-export-blocks-format-plantuml.el)
+;; Inspired by Ian Yang's org-export-blocks-format-plantuml (https://www.emacswiki.org/emacs/org-export-blocks-format-plantuml.el)
 
 ;;; Requirements:
 ;;
diff --git a/contrib/lisp/ob-stata.el b/contrib/lisp/ob-stata.el
index d8cf52a3f..f78346408 100644
--- a/contrib/lisp/ob-stata.el
+++ b/contrib/lisp/ob-stata.el
@@ -37,8 +37,8 @@
 ;; --Ista, 07/30/2014
 
 ;;; Requirements:
-;; Stata: http://stata.com
-;; ESS: http://ess.r-project.org
+;; Stata: https://stata.com
+;; ESS: https://ess.r-project.org
 
 ;;; Code:
 (require 'ob)
diff --git a/contrib/lisp/ol-wl.el b/contrib/lisp/ol-wl.el
index 9449aaf63..cc122c551 100644
--- a/contrib/lisp/ol-wl.el
+++ b/contrib/lisp/ol-wl.el
@@ -225,7 +225,7 @@ ENTITY is a message entity."
 		    (format
 		     (if (string-match-p "gmane\\." folder-name)
 			 "http://mid.gmane.org/%s"
-		       "http://groups.google.com/groups/search?as_umsgid=%s")
+                       "https://groups.google.com/groups/search?as_umsgid=%s")
 		     (url-encode-url message-id)))
 	      (org-store-link-props :type "http" :link link :description subject
 				    :from from :to to :message-id message-id
diff --git a/contrib/lisp/org-contacts.el b/contrib/lisp/org-contacts.el
index 3a30cefdc..57368e9cd 100644
--- a/contrib/lisp/org-contacts.el
+++ b/contrib/lisp/org-contacts.el
@@ -976,7 +976,7 @@ address."
 (defun org-contacts-vcard-escape (str)
   "Escape ; , and \n in STR for the VCard format."
   ;; Thanks to this library for the regexp:
-  ;; http://www.emacswiki.org/cgi-bin/wiki/bbdb-vcard-export.el
+  ;; https://www.emacswiki.org/cgi-bin/wiki/bbdb-vcard-export.el
   (when str
     (replace-regexp-in-string
      "\n" "\\\\n"
diff --git a/contrib/lisp/org-eldoc.el b/contrib/lisp/org-eldoc.el
index 8f6c2f5e7..7a6885160 100644
--- a/contrib/lisp/org-eldoc.el
+++ b/contrib/lisp/org-eldoc.el
@@ -154,7 +154,7 @@
 		   (let (eldoc-documentation-function)
 		     (eldoc-print-current-symbol-info)))))
            ((or
-             (string= lang "c") ;; http://github.com/nflath/c-eldoc
+             (string= lang "c") ;; https://github.com/nflath/c-eldoc
              (string= lang "C")) (when (require 'c-eldoc nil t)
                                    (c-eldoc-print-current-symbol-info)))
            ;; https://github.com/zenozeng/css-eldoc
diff --git a/contrib/lisp/org-learn.el b/contrib/lisp/org-learn.el
index 5cbf22d20..897216dc6 100644
--- a/contrib/lisp/org-learn.el
+++ b/contrib/lisp/org-learn.el
@@ -26,9 +26,9 @@
 ;;; Commentary:
 
 ;; The file implements the learning algorithm described at
-;; http://supermemo.com/english/ol/sm5.htm, which is a system for reading
+;; https://supermemo.com/english/ol/sm5.htm, which is a system for reading
 ;; material according to "spaced repetition".  See
-;; http://en.wikipedia.org/wiki/Spaced_repetition for more details.
+;; https://en.wikipedia.org/wiki/Spaced_repetition for more details.
 ;;
 ;; To use, turn on state logging and schedule some piece of information you
 ;; want to read.  Then in the agenda buffer type
diff --git a/contrib/lisp/org-license.el b/contrib/lisp/org-license.el
index 1bdbea2cf..4d61ae3bc 100644
--- a/contrib/lisp/org-license.el
+++ b/contrib/lisp/org-license.el
@@ -57,51 +57,51 @@ El text està disponible sota la [[" org-license-cc-url "][Reconeixement 3.0 Esp
 	 (insert (concat "* Lizenz
 Dieses Werk bzw. Inhalt steht unter einer [[" org-license-cc-url "][Lizenz Creative Commons Namensnennung 3.0 Deutschland]]\n")))
 	((equal language "eo")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by/3.0/eo/deed.eo")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by/3.0/eo/deed.eo")
 	 (insert (concat "* Licenco
 Ĉi tiu verko estas disponebla laŭ la permesilo [[" org-license-cc-url "][Krea Komunaĵo Atribuite 3.0 Neadaptita]]\n")))
 	 ((equal language "es")
-	  (setq org-license-cc-url "http://creativecommons.org/licenses/by/3.0/es/deed.es")
+          (setq org-license-cc-url "https://creativecommons.org/licenses/by/3.0/es/deed.es")
 	  (insert (concat "* Licencia
 Este documento está bajo una [[" org-license-cc-url "][Licencia Creative Commons Atribución 3.0 España]]\n")))
 	 ((equal language "eu")
-	  (setq org-license-cc-url "http://creativecommons.org/licenses/by/3.0/es/deed.eu")
+          (setq org-license-cc-url "https://creativecommons.org/licenses/by/3.0/es/deed.eu")
 	  (insert (concat "* Licenzua
 Testua [[" org-license-cc-url "][Aitortu 3.0 Espainia]] lizentziari jarraituz erabil daiteke\n")))
 	 ((equal language "fi")
-	  (setq org-license-cc-url "http://creativecommons.org/licenses/by/1.0/fi/deed.fi")
+          (setq org-license-cc-url "https://creativecommons.org/licenses/by/1.0/fi/deed.fi")
 	  (insert (concat "* Lisenssi
 Teksti on saatavilla [[" org-license-cc-url "][Nimeä 1.0 Suomi]] lisenssillä\n")))
 	 ((equal language "fr")
-	  (setq org-license-cc-url "http://creativecommons.org/licenses/by/3.0/fr/deed.fr")
+          (setq org-license-cc-url "https://creativecommons.org/licenses/by/3.0/fr/deed.fr")
 	  (insert (concat "* Licence
 Ce(tte) œuvre est mise à disposition selon les termes de la [[" org-license-cc-url "][Licence Creative Commons Attribution 3.0 France]]\n")))
 	 ((equal language "gl")
-	  (setq org-license-cc-url "http://creativecommons.org/licenses/by/3.0/es/deed.gl")
+          (setq org-license-cc-url "https://creativecommons.org/licenses/by/3.0/es/deed.gl")
 	  (insert (concat "* Licenza
 Todo o texto está dispoñible baixo a [[" org-license-cc-url "][licenza Creative Commons recoñecemento compartir igual 3.0]].\n")))
 	 ((equal language "it")
-	  (setq org-license-cc-url "http://creativecommons.org/licenses/by/3.0/it/deed.it")
+          (setq org-license-cc-url "https://creativecommons.org/licenses/by/3.0/it/deed.it")
 	  (insert (concat "* Licenza
 Quest'opera e distribuita con Licenza [[" org-license-cc-url "][Licenza Creative Commons Attribuzione 3.0 Italia]]\n")))
 	 ((equal language "jp")
-	  (setq org-license-cc-url "http://creativecommons.org/licenses/by/2.1/jp/deed.en")
+          (setq org-license-cc-url "https://creativecommons.org/licenses/by/2.1/jp/deed.en")
 	  (insert (concat "* ライセンス
 この文書は [[" org-license-cc-url "][Creative Commons Attribution 2.1 ]] ライセンスの下である\n")))
 	 ((equal language "nl")
-	  (setq org-license-cc-url "http://creativecommons.org/licenses/by/3.0/nl/deed.nl")
+          (setq org-license-cc-url "https://creativecommons.org/licenses/by/3.0/nl/deed.nl")
 	  (insert (concat "* Licentie
 Dit werk is valt onder een [[" org-license-cc-url "][Creative Commons Naamsvermelding 3.0 Nederland]]\n")))
 	 ((equal language "pt")
-	  (setq org-license-cc-url "http://creativecommons.org/licenses/by/3.0/pt/deed.pt")
+          (setq org-license-cc-url "https://creativecommons.org/licenses/by/3.0/pt/deed.pt")
 	  (insert (concat "* Licença
 Este texto é disponibilizado nos termos da licença [[" org-license-cc-url "][Atribuição 3.0 Portugal]]\n")))
 	 (t
-	  (setq org-license-cc-url "http://creativecommons.org/licenses/by/4.0/deed") 
+          (setq org-license-cc-url "https://creativecommons.org/licenses/by/4.0/deed")
 	  (concat (insert "* License
 This document is under a [[" org-license-cc-url "][Creative Commons Attribution 4.0 International]]\n"))))
   (if (string= "" org-license-images-directory)
-      (insert (concat "\n[[" org-license-cc-url "][file:http://i.creativecommons.org/l/by/3.0/80x15.png]]\n"))
+      (insert (concat "\n[[" org-license-cc-url "][file:https://i.creativecommons.org/l/by/3.0/80x15.png]]\n"))
     (insert (concat "\n[[" org-license-cc-url "][file:" org-license-images-directory "/by/3.0/80x15.png]]\n"))))
 
 (defun org-license-cc-by-sa (language)
@@ -111,55 +111,55 @@ This document is under a [[" org-license-cc-url "][Creative Commons Attribution
 	 (concat (insert "* Licença
 Este texto é disponibilizado nos termos da licença [[" org-license-cc-url "][Atribuição Compartil ha Igual 3.0 Brasil]]\n")))
 	((equal language "ca")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-sa/3.0/es/deed.ca")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-sa/3.0/es/deed.ca")
 	 (insert (concat "* Licència
 El text està disponible sota la [[" org-license-cc-url "][Reconeixement-CompartirIgual 3.0 Espanya]]\n")))
 	((equal language "de")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-sa/3.0/de/deed.de")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-sa/3.0/de/deed.de")
 	 (insert (concat "* Lizenz
 Dieses Werk bzw. Inhalt steht unter einer [[" org-license-cc-url "][Namensnennung - Weitergabe unter gleichen Bedingungen 3.0 Deutschland]]\n")))
 	((equal language "es") 
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-sa/3.0/es/deed.es") 
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-sa/3.0/es/deed.es")
 	 (concat (insert "* Licencia
 Este documento está bajo una [[" org-license-cc-url "][Licencia Creative Commons Atribución Compartir por Igual 3.0 España]]\n")))
 	((equal language "eu")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-sa/3.0/es/deed.eu")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-sa/3.0/es/deed.eu")
 	 (concat (insert "* Licenzua
 Testua [[" org-license-cc-url "][Aitortu-PartekatuBerdin 3.0 Espainia]] lizentziari jarraituz erabil daiteke\n")))
 	((equal language "fi")
-	  (setq org-license-cc-url "http://creativecommons.org/licenses/by-sa/1.0/fi/deed.fi")
+          (setq org-license-cc-url "https://creativecommons.org/licenses/by-sa/1.0/fi/deed.fi")
 	  (insert (concat "* Lisenssi
 Teksti on saatavilla [[" org-license-cc-url "][Nimeä-JaaSamoin 1.0 Suomi]] lisenssillä\n")))
 	((equal language "fr")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-sa/3.0/fr/deed.fr")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-sa/3.0/fr/deed.fr")
 	 (concat (insert "* Licence
 Ce(tte) œuvre est mise à disposition selon les termes de la [[" org-license-cc-url "][Licence Creative Commons Attribution - Partage dans les Mêmes Conditions 3.0 France]]\n")))
 	((equal language "gl")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-sa/3.0/es/deed.gl")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-sa/3.0/es/deed.gl")
 	 (insert (concat "* Licenza
 Todo o texto está dispoñible baixo a [[" org-license-cc-url "][licenza Creative Commons recoñecemento compartir igual 3.0]].\n")))
 	((equal language "it")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-sa/3.0/it/deed.it")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-sa/3.0/it/deed.it")
 	 (insert (concat "* Licenza
 Quest'opera e distribuita con Licenza [[" org-license-cc-url "][Licenza Creative Commons Attribuzione - Condividi allo stesso modo 3.0 Italia]]\n")))
 	((equal language "jp")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-sa/2.1/jp/deed.en")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-sa/2.1/jp/deed.en")
 	 (insert (concat "* ライセンス
 この文書は、[[" org-license-cc-url "][Creative Commons Attribution 2.1 ]] ライセンスの下である\n")))
 	((equal language "nl")
-	  (setq org-license-cc-url "http://creativecommons.org/licenses/by-sa/3.0/nl/deed.nl")
+          (setq org-license-cc-url "https://creativecommons.org/licenses/by-sa/3.0/nl/deed.nl")
 	  (insert (concat "* Licentie
 Dit werk is valt onder een [[" org-license-cc-url "][Creative Commons Naamsvermelding Gelijk Delen 3.0 Nederland]]\n")))
 	((equal language "pt")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-sa/3.0/pt/deed.pt")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-sa/3.0/pt/deed.pt")
 	 (insert (concat "* Licença
 Este texto é disponibilizado nos termos da licença [[" org-license-cc-url "][Atribuição-CompartilhaIgual 3.0 Portugal]]\n")))
 	(t
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-sa/4.0/deed")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-sa/4.0/deed")
 	 (insert (concat "* License
 This document is under a [[" org-license-cc-url "][Creative Commons Attribution-ShareAlike 4.0 International]]\n"))))
   (if (string= "" org-license-images-directory)
-      (insert (concat "\n[[" org-license-cc-url "][file:http://i.creativecommons.org/l/by-sa/3.0/80x15.png]]\n"))
+      (insert (concat "\n[[" org-license-cc-url "][file:https://i.creativecommons.org/l/by-sa/3.0/80x15.png]]\n"))
     (insert (concat "\n[[" org-license-cc-url "][file:" org-license-images-directory "/by-sa/3.0/80x15.png]]\n"))))
 
 (defun org-license-cc-by-nd (language)
@@ -169,55 +169,55 @@ This document is under a [[" org-license-cc-url "][Creative Commons Attribution-
 	 (insert (concat "* Licença
 Este texto é disponibilizado nos termos da licença [[" org-license-cc-url "][Atribuição Compartil ha Igual 3.0 Brasil]]\n")))
 	((equal language "ca")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nd/3.0/es/deed.ca")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nd/3.0/es/deed.ca")
 	 (insert (concat "* Licència
 El text està disponible sota la [[" org-license-cc-url "][Reconeixement-SenseObraDerivada 3.0 Espanya]]\n")))
 	((equal language "de")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nd/3.0/de/deed.de")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nd/3.0/de/deed.de")
 	 (insert (concat "* Lizenz
 Dieses Werk bzw. Inhalt steht unter einer [[" org-license-cc-url "][Namensnennung-Keine Bearbeitung 3.0 Deutschland]]\n")))
 	((equal language "es")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nd/3.0/es/deed.es") 
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nd/3.0/es/deed.es")
 	 (insert (concat "* Licencia
 Este documento está bajo una [[" org-license-cc-url "][Licencia Creative Commons Atribución-SinDerivadas 3.0]]\n")))
 	((equal language "eu")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nd/3.0/es/deed.eu")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nd/3.0/es/deed.eu")
 	 (insert (concat "* Licenzua
 Testua [[" org-license-cc-url "][Aitortu-LanEratorririkGabe 3.0 Espainia]] lizentziari jarraituz erabil daiteke\n")))
 	((equal language "fi")
-	  (setq org-license-cc-url "http://creativecommons.org/licenses/by-nd/1.0/fi/deed.fi")
+          (setq org-license-cc-url "https://creativecommons.org/licenses/by-nd/1.0/fi/deed.fi")
 	  (insert (concat "* Lisenssi
 Teksti on saatavilla [[" org-license-cc-url "][Nimeä-JaaSamoin 1.0 Suomi]] lisenssillä\n")))
 	((equal language "fr")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nd/3.0/fr/deed.fr")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nd/3.0/fr/deed.fr")
 	 (insert (concat "* Licence
 Ce(tte) œuvre est mise à disposition selon les termes de la [[" org-license-cc-url "][Licence Creative Commons Attribution - Pas de Modification 3.0 France]]\n")))
 	((equal language "gl")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nd/3.0/es/deed.gl")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nd/3.0/es/deed.gl")
 	 (insert (concat "* Licenza
 Todo o texto está dispoñible baixo a [[" org-license-cc-url "][licenza Creative Commons recoñecemento compartir igual 3.0]].\n")))
 	((equal language "it")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nd/3.0/it/deed.it")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nd/3.0/it/deed.it")
 	 (insert (concat "* Licenza
 Quest'opera e distribuita con Licenza [[" org-license-cc-url "][Licenza Creative Commons Attribuzione - Non opere derivate 3.0 Italia]]\n")))
 	((equal language "jp")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nd/2.1/jp/deed.en")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nd/2.1/jp/deed.en")
 	 (insert (concat "* ライセンス
 この文書は、[[" org-license-cc-url "][Creative Commons No Derivatives 2.1]] ライセンスの下である\n")))
 	((equal language "nl")
-	  (setq org-license-cc-url "http://creativecommons.org/licenses/by-nd/3.0/nl/deed.nl")
+          (setq org-license-cc-url "https://creativecommons.org/licenses/by-nd/3.0/nl/deed.nl")
 	  (insert (concat "* Licentie
 Dit werk is valt onder een [[" org-license-cc-url "][Creative Commons Naamsvermelding GeenAfgeleideWerken 3.0 Nederland]]\n")))
 	((equal language "pt")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nd/3.0/pt/deed.pt")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nd/3.0/pt/deed.pt")
 	 (insert (concat "* Licença
 Este texto é disponibilizado nos termos da licença [[" org-license-cc-url "][Atribuição Sem Derivados 3.0 Portugal]]\n")))
 	(t
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nd/4.0/deed")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nd/4.0/deed")
 	 (insert (concat "* License
 This document is under a [[" org-license-cc-url "][Creative Commons No Derivatives 4.0 International]]\n"))))
   (if (string= "" org-license-images-directory)
-      (insert (concat "\n[[" org-license-cc-url "][file:http://i.creativecommons.org/l/by-nd/3.0/80x15.png]]\n"))
+      (insert (concat "\n[[" org-license-cc-url "][file:https://i.creativecommons.org/l/by-nd/3.0/80x15.png]]\n"))
     (insert (concat "\n[[" org-license-cc-url "][file:" org-license-images-directory "/by-nd/3.0/80x15.png]]\n"))))
 
 
@@ -228,55 +228,55 @@ This document is under a [[" org-license-cc-url "][Creative Commons No Derivativ
 	 (insert (concat "* Licença
 Este texto é disponibilizado nos termos da licença [[" org-license-cc-url "][Atribuição Não Comercial 3.0 Brasil]]\n")))
 	((equal language "ca")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc/3.0/es/deed.ca")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc/3.0/es/deed.ca")
 	 (insert (concat "* Licència
 El text està disponible sota la [[" org-license-cc-url "][Reconeixement-NoComercial 3.0 Espanya]]\n")))
 	((equal language "de")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc/3.0/de/deed.de")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc/3.0/de/deed.de")
 	 (insert (concat "* Lizenz
 Dieses Werk bzw. Inhalt steht unter einer [[" org-license-cc-url "][Namensnennung-Nicht-kommerziell 3.0 Deutschland]]\n")))
 	((equal language "es")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc/3.0/es/deed.es")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc/3.0/es/deed.es")
 	 (insert (concat "* Licencia
 Este documento está bajo una [[" org-license-cc-url "][Licencia Creative Commons Reconocimiento-NoComercial 3.0]]\n")))
 	((equal language "eu")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc/3.0/es/deed.eu")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc/3.0/es/deed.eu")
 	 (insert "* Licenzua
 Testua [[" org-license-cc-url "][Aitortu-EzKomertziala 3.0 Espainia]] lizentziari jarraituz erabil daiteke\n"))
 	((equal language "fi")
-	  (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc/1.0/fi/deed.fi")
+          (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc/1.0/fi/deed.fi")
 	  (insert (concat "* Lisenssi
 Teksti on saatavilla [[" org-license-cc-url "][Nimeä-Epäkaupallinen 1.0 Suomi]] lisenssillä\n")))
 	((equal language "fr")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc/3.0/fr/deed.fr")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc/3.0/fr/deed.fr")
 	 (insert (concat "* Licence
 Ce(tte) œuvre est mise à disposition selon les termes de la [[" org-license-cc-url "][Licence Creative Commons Attribution - Pas d'Utilisation Commerciale 3.0 France]]\n")))
 	((equal language "gl")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc/3.0/es/deed.gl")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc/3.0/es/deed.gl")
 	 (insert (concat "* Licenza
 Todo o texto está dispoñible baixo a [[" org-license-cc-url "][licenza Creative Commons recoñecemento compartir igual 3.0]].\n")))
 	((equal language "it")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc/3.0/it/deed.it")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc/3.0/it/deed.it")
 	 (insert (concat "* Licenza
 Quest'opera e distribuita con Licenza [[" org-license-cc-url "][Licenza Creative Commons Attribuzione - Non commerciale 3.0 Italia]]\n")))
 	((equal language "jp")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc/2.1/jp/deed.en")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc/2.1/jp/deed.en")
 	 (insert (concat "* ライセンス
 この文書は、[[" org-license-cc-url "][Creative Commons Attribution-NonCommercial 2.1 ]] ライセンスの下である\n")))
 	((equal language "nl")
-	  (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc/3.0/nl/deed.nl")
+          (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc/3.0/nl/deed.nl")
 	  (insert (concat "* Licentie
 Dit werk is valt onder een [[" org-license-cc-url "][Creative Commons Naamsvermelding NietCommercieel 3.0 Nederland 3.0 Nederland]]\n")))
 	((equal language "pt")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc/3.0/pt/deed.pt")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc/3.0/pt/deed.pt")
 	 (insert (concat "* Licença
 Este texto é disponibilizado nos termos da licença [[" org-license-cc-url "][Atribuição Não Comercial 3.0 Portugal]]\n")))
 	(t 
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc/4.0/deed")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc/4.0/deed")
 	 (insert (concat "* License 
 This document is under a [[" org-license-cc-url "][Creative Commons Attribution-NonCommercial 4.0 International]]\n"))))
   (if (string= "" org-license-images-directory)
-      (insert (concat "\n[[" org-license-cc-url "][file:http://i.creativecommons.org/l/by-nc/3.0/80x15.png]]\n"))
+      (insert (concat "\n[[" org-license-cc-url "][file:https://i.creativecommons.org/l/by-nc/3.0/80x15.png]]\n"))
     (insert (concat "\n[[" org-license-cc-url "][file:" org-license-images-directory "/by-nc/3.0/80x15.png]]\n"))))
 
 (defun org-license-cc-by-nc-sa (language)
@@ -286,113 +286,113 @@ This document is under a [[" org-license-cc-url "][Creative Commons Attribution-
 	 (insert (concat "* Licença
 Este texto é disponibilizado nos termos da licença [[" org-license-cc-url "][Atribuição Não Comercial - Compartil ha Igual 3.0 Brasil]]\n")))
 	((equal language "ca")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc-sa/3.0/es/deed.ca")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc-sa/3.0/es/deed.ca")
 	 (insert (concat "* Licència
 El text està disponible sota la [[" org-license-cc-url "][Reconeixement-NoComercial 3.0 Espanya]]\n")))
 	((equal language "de")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc-sa/3.0/de/deed.de")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc-sa/3.0/de/deed.de")
 	 (insert (concat "* Lizenz
 Dieses Werk bzw. Inhalt steht unter einer [[" org-license-cc-url "][Namensnennung - Weitergabe unter gleichen Bedingungen 3.0 Deutschland]]\n")))
 	((equal language "es")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc-sa/3.0/es/deed.es") 
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc-sa/3.0/es/deed.es")
 	 (insert (concat "* Licencia
 Este documento está bajo una [[" org-license-cc-url "][Licencia Creative Commons Reconocimiento-NoComercial 3.0]]\n")))
 	((equal language "eu")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc-sa/3.0/es/deed.eu")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc-sa/3.0/es/deed.eu")
 	 (insert "* Licenzua
 Testua [[" org-license-cc-url "][Aitortu-EzKomertziala-PartekatuBerdin 3.0 Espainia]] lizentziari jarraituz erabil daiteke\n"))
 	((equal language "fi")
-	  (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc-sa/1.0/fi/deed.fi")
+          (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc-sa/1.0/fi/deed.fi")
 	  (insert (concat "* Lisenssi
 Teksti on saatavilla [[" org-license-cc-url "][Nimeä-Epäkaupallinen-JaaSamoin 1.0 Suomi]] lisenssillä\n")))
 	((equal language "fr")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc-sa/3.0/fr/deed.fr")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc-sa/3.0/fr/deed.fr")
 	 (insert (concat "* Licence
 Ce(tte) œuvre est mise à disposition selon les termes de la [[" org-license-cc-url "][Licence Creative Commons Attribution - Pas d’Utilisation Commerciale - Partage dans les Mêmes Conditions 3.0 France]]\n")))
 	((equal language "gl")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc-sa/3.0/es/deed.gl")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc-sa/3.0/es/deed.gl")
 	 (insert (concat "* Licenza
 Todo o texto está dispoñible baixo a [[" org-license-cc-url "][licenza Creative Commons recoñecemento compartir igual 3.0]].\n")))
 	((equal language "it")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc-sa/3.0/it/deed.it")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc-sa/3.0/it/deed.it")
 	 (insert (concat "* Licenza
 Quest'opera e distribuita con Licenza [[" org-license-cc-url "][Licenza Creative Commons Attribuzione - Non opere derivate 3.0 Italia]]\n")))
 	((equal language "jp")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc-sa/2.1/jp/deed.en")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc-sa/2.1/jp/deed.en")
 	 (insert (concat "* ライセンス
 この文書は、[[" org-license-cc-url "][License Creative Commons Attribution Non Commercial Share Alike 2.1 ]] ライセンスの下である\n")))
 	((equal language "nl")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc-sa/3.0/nl/deed.nl")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc-sa/3.0/nl/deed.nl")
 	 (insert (concat "* Licentie
 Dit werk is valt onder een [[" org-license-cc-url "][Creative Commons Naamsvermelding NietCommercieel GelijkDelen 3.0 Nederland]]\n")))
 	((equal language "pt")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc/3.0/pt/deed.pt")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc/3.0/pt/deed.pt")
 	 (insert (concat "* Licença
 Este texto é disponibilizado nos termos da licença [[" org-license-cc-url "][Atribuição NãoComercial Compartil ha Igual 3.0 Portugal]]\n")))
 	(t 
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc-sa/4.0/deed")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc-sa/4.0/deed")
 	 (insert (concat "* License
 This document is under a [[" org-license-cc-url "][License Creative Commons Attribution Non Commercial Share Alike 4.0 International]]\n"))))
   (if (string= "" org-license-images-directory)
-      (insert (concat "\n[[" org-license-cc-url  "][file:http://i.creativecommons.org/l/by-nc-sa/3.0/80x15.png]]\n"))
+      (insert (concat "\n[[" org-license-cc-url  "][file:https://i.creativecommons.org/l/by-nc-sa/3.0/80x15.png]]\n"))
     (insert (concat "\n[[" org-license-cc-url "][file:" org-license-images-directory "/by-nc-sa/3.0/80x15.png]]\n"))))
 
 (defun org-license-cc-by-nc-nd (language)
   (interactive "MLanguage ( br | ca | de | en | es | eu | fi | fr | gl | it | pt ): " language)
   (cond ((equal language "br")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc-nd/3.0/pt/deed.pt")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc-nd/3.0/pt/deed.pt")
 	 (insert (concat "* Licença
 Este texto é disponibilizado nos termos da licença [[" org-license-cc-url "][Atribuição Não Comercial Sem Derivados 3.0 Brasil]]\n")))
 	((equal language "ca")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc-nd/3.0/es/deed.ca")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc-nd/3.0/es/deed.ca")
 	 (insert (concat "* Licència
 El text està disponible sota la [[" org-license-cc-url "][Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya]]\n")))
 	((equal language "de")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc-nd/3.0/de/deed.de")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc-nd/3.0/de/deed.de")
 	 (insert (concat "* Lizenz
 Dieses Werk bzw. Inhalt steht unter einer [[" org-license-cc-url "][Namensnennung-NichtKommerziell-KeineBearbeitung 3.0 Deutschland]]\n")))
 	((equal language "es")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc-nd/3.0/es/deed.es")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc-nd/3.0/es/deed.es")
 	 (insert (concat "* Licencia 
 Este documento está bajo una [[" org-license-cc-url "][Licencia Creative Commons Reconocimiento-NoComercial-SinObraDerivada 3.0]]\n")))
 	((equal language "eu")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc-nd/3.0/es/deed.eu")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc-nd/3.0/es/deed.eu")
 	 (insert (concat "* Licenzua
 Testua [[" org-license-cc-url "][Aitortu-LanEratorririkGabe 3.0 Espainia]] lizentziari jarraituz erabil daiteke\n")))
 	((equal language "fi")
-	  (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc-nd/1.0/fi/deed.fi")
+          (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc-nd/1.0/fi/deed.fi")
 	  (insert (concat "* Lisenssi
 Teksti on saatavilla [[" org-license-cc-url "][Nimeä-Ei muutoksia-Epäkaupallinen 1.0 Suomi]] lisenssillä\n")))
 	((equal language "fr")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc-nd/3.0/fr/deed.fr")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc-nd/3.0/fr/deed.fr")
 	 (insert (concat "* Licence
 Ce(tte) œuvre est mise à disposition selon les termes de la [[" org-license-cc-url "][Licence Creative Commons Attribution - Pas de Modification 3.0 France]]\n")))
 	((equal language "gl")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc-nd/3.0/es/deed.gl")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc-nd/3.0/es/deed.gl")
 	 (insert (concat "* Licenza
 Todo o texto está dispoñible baixo a [[" org-license-cc-url "][licenza Creative Commons recoñecemento compartir igual 3.0]].\n")))
 	((equal language "it")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc-nd/3.0/it/deed.it")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc-nd/3.0/it/deed.it")
 	 (insert (concat "* Licenza
 Quest'opera e distribuita con Licenza [[" org-license-cc-url "][Licenza Creative Commons Attribuzione - Non opere derivate 3.0 Italia]]\n")))
 	((equal language "jp")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc-nd/2.1/jp/deed.en")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc-nd/2.1/jp/deed.en")
 	 (insert (concat "* ライセンス
 この文書は [[" org-license-cc-url "][License Creative Commons Attribution Non Commercial - No Derivs 2.1]] ライセンスの下である\n")))
 	((equal language "nl")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc-nd/3.0/nl/deed.nl")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc-nd/3.0/nl/deed.nl")
 	 (insert (concat "* Licentie
 Dit werk is valt onder een [[" org-license-cc-url "][Creative Commons Naamsvermelding NietCommercieel GeenAfgeleideWerken 3.0 Nederland]]\n")))
 	((equal language "pt")
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc-nd/3.0/pt/deed.pt")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc-nd/3.0/pt/deed.pt")
 	 (insert (concat "* Licença
 Este texto é disponibilizado nos termos da licença [[" org-license-cc-url "][Atribuição Não Comercial Sem Derivados 3.0 Portugal]]\n")))
 	(t 
-	 (setq org-license-cc-url "http://creativecommons.org/licenses/by-nc-nd/4.0/deed")
+         (setq org-license-cc-url "https://creativecommons.org/licenses/by-nc-nd/4.0/deed")
 	 (insert (concat "* License
 This document is under a [[" org-license-cc-url "][License Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International]]\n"))))
   (if (string= "" org-license-images-directory)
-      (insert (concat "\n[[" org-license-cc-url "][file:http://i.creativecommons.org/l/by-nc-nd/3.0/80x15.png]]\n"))
+      (insert (concat "\n[[" org-license-cc-url "][file:https://i.creativecommons.org/l/by-nc-nd/3.0/80x15.png]]\n"))
     (insert (concat "\n[[" org-license-cc-url "][file:" org-license-images-directory "/by-nc-nd/3.0/80x15.png]]\n"))))
 
 (defun org-license-gfdl (language)
@@ -418,7 +418,7 @@ Copyright (C) " (format-time-string "%Y") " " user-full-name
 
 (defun org-license-publicdomain-zero (language)
   (interactive "MLanguage ( en | es ): " language)
-  (setq org-license-pd-url "http://creativecommons.org/publicdomain/zero/1.0/")
+  (setq org-license-pd-url "https://creativecommons.org/publicdomain/zero/1.0/")
   (setq org-license-pd-file "zero/1.0/80x15.png")
   (if (equal language "es")
          (insert (concat "* Licencia
@@ -426,12 +426,12 @@ Este documento está bajo una licencia [[" org-license-pd-url "][Public Domain Z
     (insert (concat "* License
 This documento is under a [[" org-license-pd-url "][Public Domain Zero]] license\n")))
   (if (string= "" org-license-images-directory)
-      (insert (concat "\n[[" org-license-pd-url "][file:http://i.creativecommons.org/p/zero/1.0/80x15.png]]\n"))
+      (insert (concat "\n[[" org-license-pd-url "][file:https://i.creativecommons.org/p/zero/1.0/80x15.png]]\n"))
     (insert (concat "\n[[" org-license-pd-url "][file:" org-license-images-directory org-license-pd-file "]]\n"))))
 
 (defun org-license-publicdomain-mark (language)
   (interactive "MLanguage ( en | es ): " language)
-  (setq org-license-pd-url "http://creativecommons.org/publicdomain/mark/1.0/")
+  (setq org-license-pd-url "https://creativecommons.org/publicdomain/mark/1.0/")
   (setq org-license-pd-file "mark/1.0/80x15.png")
   (if (equal language "es")
          (insert (concat "* Licencia
@@ -439,7 +439,7 @@ Este documento está bajo una licencia [[" org-license-pd-url "][Etiqueta de Dom
     (insert (concat "* License
 This documento is under a [[" org-license-pd-url "][Public Domain Mark]] license\n")))
   (if (string= "" org-license-images-directory)
-      (insert (concat "\n[[" org-license-pd-url "][file:http://i.creativecommons.org/p/mark/1.0/80x15.png]]\n"))
+      (insert (concat "\n[[" org-license-pd-url "][file:https://i.creativecommons.org/p/mark/1.0/80x15.png]]\n"))
     (insert (concat "\n[[" org-license-pd-url "][file:" org-license-images-directory org-license-pd-file "]]\n"))))
 
 (defun org-license-print-all ()
diff --git a/contrib/lisp/ox-bibtex.el b/contrib/lisp/ox-bibtex.el
index 54f446d32..c7096ccb6 100644
--- a/contrib/lisp/ox-bibtex.el
+++ b/contrib/lisp/ox-bibtex.el
@@ -26,11 +26,11 @@
 ;; This is an utility to handle BibTeX export to LaTeX, html and ascii
 ;; exports.  For HTML and ascii it uses the bibtex2html software from:
 ;;
-;;   http://www.lri.fr/~filliatr/bibtex2html/
+;;   https://www.lri.fr/~filliatr/bibtex2html/
 ;;
 ;; For ascii it uses the pandoc software from:
 ;;
-;;   http://johnmacfarlane.net/pandoc/
+;;   https://pandoc.org/
 ;;
 ;; It also introduces "cite" syntax for Org links.
 ;;
diff --git a/contrib/lisp/ox-rss.el b/contrib/lisp/ox-rss.el
index 5269e1691..53f341b47 100644
--- a/contrib/lisp/ox-rss.el
+++ b/contrib/lisp/ox-rss.el
@@ -34,8 +34,8 @@
 ;; This backend understands three new option keywords:
 ;;
 ;; #+RSS_EXTENSION: xml
-;; #+RSS_IMAGE_URL: http://myblog.org/mypicture.jpg
-;; #+RSS_FEED_URL: http://myblog.org/feeds/blog.xml
+;; #+RSS_IMAGE_URL: https://myblog.org/mypicture.jpg
+;; #+RSS_FEED_URL: https://myblog.org/feeds/blog.xml
 ;;
 ;; It uses #+HTML_LINK_HOME: to set the base url of the feed.
 ;;
diff --git a/contrib/lisp/ox-s5.el b/contrib/lisp/ox-s5.el
index 4b5ae7c73..748101703 100644
--- a/contrib/lisp/ox-s5.el
+++ b/contrib/lisp/ox-s5.el
@@ -28,7 +28,7 @@
 ;; Installation
 ;; ------------
 ;; Get the s5 scripts from
-;;    http://meyerweb.com/eric/tools/s5/
+;;    https://meyerweb.com/eric/tools/s5/
 ;; (Note that the default s5 version is set for using the alpha, 1.2a2.
 ;; Copy the ui dir to somewhere reachable from your published presentation
 ;; The default (`org-s5-ui-url') is set to "ui" (e.g., in the
diff --git a/contrib/lisp/ox-taskjuggler.el b/contrib/lisp/ox-taskjuggler.el
index 43de39433..50014d89f 100644
--- a/contrib/lisp/ox-taskjuggler.el
+++ b/contrib/lisp/ox-taskjuggler.el
@@ -64,7 +64,7 @@
 ;; should end up with something similar to the example by Peter Jones
 ;; in:
 ;;
-;;   http://www.devalot.com/assets/articles/2008/07/project-planning/project-planning.org.
+;;   https://www.devalot.com/assets/articles/2008/07/project-planning/project-planning.org.
 ;;
 ;; Now mark the top node of your tasks with a tag named
 ;; "taskjuggler_project" (or whatever you customized
diff --git a/contrib/scripts/org-docco.org b/contrib/scripts/org-docco.org
index 4e9b65995..ed8714f1a 100644
--- a/contrib/scripts/org-docco.org
+++ b/contrib/scripts/org-docco.org
@@ -3,7 +3,7 @@
 #+Style: <link rel="stylesheet" href="docco.css" type="text/css">
 #+Property: tangle yes
 
-The =docco= tool (see http://jashkenas.github.com/docco/) generates
+The =docco= tool (see https://jashkenas.github.com/docco/) generates
 HTML from JavaScript source code providing an attractive side-by-side
 display of source code and comments.  This file (see [[https://orgmode.org/cgit.cgi/org-mode.git/plain/contrib/scripts/org-docco.org][org-docco.org]])
 generates the same type of output from Org-mode documents with code
diff --git a/contrib/scripts/org2hpda b/contrib/scripts/org2hpda
index 93b12aa5e..01dac897a 100755
--- a/contrib/scripts/org2hpda
+++ b/contrib/scripts/org2hpda
@@ -32,7 +32,7 @@
 # two PDFs containing nicely printed weekly and monthly calendars. One
 # is done in the style of a pocketMod (http://www.pocketmod.com/) and
 # the other is done in the style of the Hipster PDA
-# (http://en.wikipedia.org/wiki/Hipster_PDA). 
+# (https://en.wikipedia.org/wiki/Hipster_PDA). 
 #
 # Requirements:
 # =============
diff --git a/contrib/scripts/staticmathjax/README.org b/contrib/scripts/staticmathjax/README.org
index d15bf9517..e813eaf26 100644
--- a/contrib/scripts/staticmathjax/README.org
+++ b/contrib/scripts/staticmathjax/README.org
@@ -12,7 +12,7 @@ current Org development version.)
 
 Optionally, references to the math fonts used will be converted to
 "data:" URIs, thus embedding the font data into the HTML file itself.
-(see [[http://en.wikipedia.org/wiki/Data_URI_scheme]])
+(see [[https://en.wikipedia.org/wiki/Data_URI_scheme]])
 
 The code is licensed under the GNU General Public License version
 2, or, at your option, any later version.
diff --git a/doc/fdl.org b/doc/fdl.org
index a1c8e542d..2cc082bbd 100644
--- a/doc/fdl.org
+++ b/doc/fdl.org
@@ -7,7 +7,7 @@ Version 1.3, 3 November 2008
 
 #+begin_verse
 Copyright \copy{} 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc.
-http://fsf.org/
+https://fsf.org/
 
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.
diff --git a/doc/org-manual.org b/doc/org-manual.org
index 12b0bf0a1..0dbc5e205 100644
--- a/doc/org-manual.org
+++ b/doc/org-manual.org
@@ -2826,7 +2826,7 @@ either graphically or in ASCII art.
 
 #+cindex: @samp{PLOT}, keyword
 Org Plot can produce 2D and 3D graphs of information stored in Org
-tables using [[http://www.gnuplot.info/][Gnuplot]] and [[http://cars9.uchicago.edu/~ravel/software/gnuplot-mode.html][Gnuplot mode]].  To see this in action, ensure
+tables using [[https://www.gnuplot.info/][Gnuplot]] and [[http://cars9.uchicago.edu/~ravel/software/gnuplot-mode.html][Gnuplot mode]].  To see this in action, ensure
 that you have both Gnuplot and Gnuplot mode installed on your system,
 then call {{{kbd(C-c \quot g)}}} or {{{kbd(M-x org-plot/gnuplot)}}} on the
 following table.
@@ -8331,7 +8331,7 @@ variable has detailed information.  With the following
 #+begin_src emacs-lisp
 (setq org-feed-alist
       '(("Slashdot"
-         "http://rss.slashdot.org/Slashdot/slashdot"
+         "https://rss.slashdot.org/Slashdot/slashdot"
          "~/txt/org/feeds.org" "Slashdot Entries")))
 #+end_src
 
@@ -10935,7 +10935,7 @@ pretty output for a number of export back-ends.
 Org mode can contain LaTeX math fragments, and it supports ways to
 process these for several export back-ends.  When exporting to LaTeX,
 the code is left as it is.  When exporting to HTML, Org can use either
-[[http://www.mathjax.org][MathJax]] (see [[*Math formatting in HTML export]]) or transcode the math
+[[https://www.mathjax.org][MathJax]] (see [[*Math formatting in HTML export]]) or transcode the math
 into images (see [[*Previewing LaTeX fragments]]).
 
 LaTeX fragments do not need any special marking at all.  The following
@@ -13000,7 +13000,7 @@ as-is.
 
 #+vindex: org-html-mathjax-options~
 LaTeX math snippets (see [[*LaTeX fragments]]) can be displayed in two
-different ways on HTML pages.  The default is to use the [[http://www.mathjax.org][MathJax]],
+different ways on HTML pages.  The default is to use the [[https://www.mathjax.org][MathJax]],
 which should work out of the box with Org[fn:129][fn:130].  Some MathJax
 display options can be configured via ~org-html-mathjax-options~, or
 in the buffer.  For example, with the following settings,
@@ -17627,7 +17627,7 @@ follows from the type specified above.
 
   #+begin_example
   ,#+begin_src shell :results file link :file "download.tar.gz"
-  wget -c "http://example.com/download.tar.gz"
+  wget -c "https://example.com/download.tar.gz"
   ,#+end_src
   #+end_example
 
@@ -19707,13 +19707,13 @@ click the bookmark and start editing.
 #+cindex: rewritten URL in open-source protocol
 #+cindex: protocol, open-source rewritten URL
 However, such mapping may not always yield the desired results.
-Suppose you maintain an online store located at =http://example.com/=.
+Suppose you maintain an online store located at =https://example.com/=.
 The local sources reside in =/home/user/example/=.  It is common
 practice to serve all products in such a store through one file and
 rewrite URLs that do not match an existing file on the server.  That
-way, a request to =http://example.com/print/posters.html= might be
+way, a request to =https://example.com/print/posters.html= might be
 rewritten on the server to something like
-=http://example.com/shop/products.php/posters.html.php=.  The
+=https://example.com/shop/products.php/posters.html.php=.  The
 ~open-source~ handler probably cannot find a file named
 =/home/user/example/print/posters.html.php= and fails.
 
@@ -19728,7 +19728,7 @@ adding ~:rewrites~ rules like this:
 #+begin_src emacs-lisp
 (setq org-protocol-project-alist
       '(("example.com"
-         :base-url "http://example.com/"
+         :base-url "https://example.com/"
          :working-directory "/home/user/example/"
          :online-suffix ".php"
          :working-suffix ".php"
@@ -21840,7 +21840,7 @@ to make it visible.  The tag serves as a visual aid and has no
 semantic relevance.
 
 [fn:129] By default Org loads MathJax from [[https://cdnjs.com][cdnjs.com]] as recommended by
-[[http://www.mathjax.org][MathJax]].
+[[https://www.mathjax.org][MathJax]].
 
 [fn:130] Please note that exported formulas are part of an HTML
 document, and that signs such as =<=, =>=, or =&= have special
diff --git a/doc/texinfo.tex b/doc/texinfo.tex
index 481cd02cc..f3c25b92d 100644
--- a/doc/texinfo.tex
+++ b/doc/texinfo.tex
@@ -29,8 +29,8 @@
 %
 % Please try the latest version of texinfo.tex before submitting bug
 % reports; you can get the latest version from:
-%   http://ftp.gnu.org/gnu/texinfo/ (the Texinfo release area), or
-%   http://ftpmirror.gnu.org/texinfo/ (same, via a mirror), or
+%   https://ftp.gnu.org/gnu/texinfo/ (the Texinfo release area), or
+%   https://ftpmirror.gnu.org/texinfo/ (same, via a mirror), or
 %   https://www.gnu.org/software/texinfo/ (the Texinfo home page)
 % The texinfo.tex in any given distribution could well be out
 % of date, so if that's what you're using, please check.
@@ -3101,7 +3101,7 @@ end
 % We use the free feym* fonts from the eurosym package by Henrik
 % Theiling, which support regular, slanted, bold and bold slanted (and
 % "outlined" (blackboard board, sort of) versions, which we don't need).
-% It is available from http://www.ctan.org/tex-archive/fonts/eurosym.
+% It is available from https://www.ctan.org/tex-archive/fonts/eurosym.
 %
 % Although only regular is the truly official Euro symbol, we ignore
 % that.  The Euro is designed to be slightly taller than the regular
diff --git a/etc/ORG-NEWS b/etc/ORG-NEWS
index 9fc126b2f..6e3c06f32 100644
--- a/etc/ORG-NEWS
+++ b/etc/ORG-NEWS
@@ -4488,8 +4488,8 @@ found here: https://orgmode.org/worg/org-tutorials/org-outside-org.html
 
 Here are two screencasts demonstrating Thorsten's tools:
 
-- [[http://youtu.be/nqE6YxlY0rw]["Modern conventions for Emacs Lisp files"]]
-- [[http://www.youtube.com/watch?v%3DII-xYw5VGFM][Exploring Bernt Hansen's Org-mode tutorial with 'navi-mode']]
+- [[https://youtu.be/nqE6YxlY0rw]["Modern conventions for Emacs Lisp files"]]
+- [[https://www.youtube.com/watch?v%3DII-xYw5VGFM][Exploring Bernt Hansen's Org-mode tutorial with 'navi-mode']]
 
 *** MobileOrg for iOS
 
diff --git a/lisp/ob-clojure.el b/lisp/ob-clojure.el
index 1cc0010aa..3b995d94c 100644
--- a/lisp/ob-clojure.el
+++ b/lisp/ob-clojure.el
@@ -39,7 +39,7 @@
 
 ;; For SLIME, the best way to install these components is by following
 ;; the directions as set out by Phil Hagelberg (Technomancy) on the
-;; web page: http://technomancy.us/126
+;; web page: https://technomancy.us/126
 
 ;;; Code:
 (require 'ob)
diff --git a/lisp/ob-dot.el b/lisp/ob-dot.el
index a8cd7d1eb..8e05a59f2 100644
--- a/lisp/ob-dot.el
+++ b/lisp/ob-dot.el
@@ -26,7 +26,7 @@
 
 ;; Org-Babel support for evaluating dot source code.
 ;;
-;; For information on dot see http://www.graphviz.org/
+;; For information on dot see https://www.graphviz.org/
 ;;
 ;; This differs from most standard languages in that
 ;;
diff --git a/lisp/ob-gnuplot.el b/lisp/ob-gnuplot.el
index 02f3c9518..c0a9ff13a 100644
--- a/lisp/ob-gnuplot.el
+++ b/lisp/ob-gnuplot.el
@@ -33,7 +33,7 @@
 
 ;;; Requirements:
 
-;; - gnuplot :: http://www.gnuplot.info/
+;; - gnuplot :: https://www.gnuplot.info/
 ;;
 ;; - gnuplot-mode :: you can search the web for the latest active one.
 
diff --git a/lisp/ob-haskell.el b/lisp/ob-haskell.el
index 03f4d907f..c8d2809f4 100644
--- a/lisp/ob-haskell.el
+++ b/lisp/ob-haskell.el
@@ -34,9 +34,9 @@
 
 ;;; Requirements:
 
-;; - haskell-mode: http://www.iro.umontreal.ca/~monnier/elisp/#haskell-mode
-;; - inf-haskell: http://www.iro.umontreal.ca/~monnier/elisp/#haskell-mode
-;; - (optionally) lhs2tex: http://people.cs.uu.nl/andres/lhs2tex/
+;; - haskell-mode: https://www.iro.umontreal.ca/~monnier/elisp/#haskell-mode
+;; - inf-haskell: https://www.iro.umontreal.ca/~monnier/elisp/#haskell-mode
+;; - (optionally) lhs2tex: https://people.cs.uu.nl/andres/lhs2tex/
 
 ;;; Code:
 (require 'ob)
diff --git a/lisp/ob-io.el b/lisp/ob-io.el
index 63d2b6cf3..a366d6d74 100644
--- a/lisp/ob-io.el
+++ b/lisp/ob-io.el
@@ -27,7 +27,7 @@
 ;; :results output repl -- runs in repl mode
 
 ;;; Requirements:
-;; - Io language :: http://iolanguage.org/
+;; - Io language :: https://iolanguage.org/
 ;; - Io major mode :: Can be installed from Io sources
 ;;  https://github.com/stevedekorte/io/blob/master/extras/SyntaxHighlighters/Emacs/io-mode.el
 
diff --git a/lisp/ob-lilypond.el b/lisp/ob-lilypond.el
index 47397e662..0ed191982 100644
--- a/lisp/ob-lilypond.el
+++ b/lisp/ob-lilypond.el
@@ -27,9 +27,9 @@
 ;; https://orgmode.org/worg/org-contrib/babel/languages/ob-doc-lilypond.html
 ;;
 ;; Lilypond documentation can be found at
-;; http://lilypond.org/manuals.html
+;; https://lilypond.org/manuals.html
 ;;
-;; This depends on epstopdf --- See http://www.ctan.org/pkg/epstopdf.
+;; This depends on epstopdf --- See https://www.ctan.org/pkg/epstopdf.
 
 ;;; Code:
 (require 'ob)
diff --git a/lisp/ob-lisp.el b/lisp/ob-lisp.el
index 87b9241e7..b32b122cd 100644
--- a/lisp/ob-lisp.el
+++ b/lisp/ob-lisp.el
@@ -33,7 +33,7 @@
 ;; Requires SLY (Sylvester the Cat's Common Lisp IDE) or SLIME
 ;; (Superior Lisp Interaction Mode for Emacs).  See:
 ;; - https://github.com/capitaomorte/sly
-;; - http://common-lisp.net/project/slime/
+;; - https://common-lisp.net/project/slime/
 
 ;;; Code:
 (require 'ob)
diff --git a/lisp/ob-mscgen.el b/lisp/ob-mscgen.el
index 2cd68958d..5ec082aec 100644
--- a/lisp/ob-mscgen.el
+++ b/lisp/ob-mscgen.el
@@ -29,7 +29,7 @@
 ;; sequence definition, and must therefore be installed in the system.
 ;;
 ;; Mscgen is available and documented at
-;; http://www.mcternan.me.uk/mscgen/index.html
+;; https://www.mcternan.me.uk/mscgen/index.html
 ;;
 ;; This code is directly inspired by Eric Schulte's ob-dot.el
 ;;
diff --git a/lisp/ob-ocaml.el b/lisp/ob-ocaml.el
index 0aa91afdb..5fd6d1e09 100644
--- a/lisp/ob-ocaml.el
+++ b/lisp/ob-ocaml.el
@@ -32,7 +32,7 @@
 
 ;;; Requirements:
 
-;; - tuareg-mode :: http://www-rocq.inria.fr/~acohen/tuareg/
+;; - tuareg-mode :: https://www-rocq.inria.fr/~acohen/tuareg/
 
 ;;; Code:
 (require 'ob)
diff --git a/lisp/ob-picolisp.el b/lisp/ob-picolisp.el
index b1587f2b8..a867523f3 100644
--- a/lisp/ob-picolisp.el
+++ b/lisp/ob-picolisp.el
@@ -32,9 +32,9 @@
 ;; read Paul Grahams essay "The hundred year language"
 ;; (http://www.paulgraham.com/hundred.html) and then study the various
 ;; documents and essays published in the PicoLisp wiki
-;; (http://picolisp.com/5000/-2.html). PicoLisp is included in some
+;; (https://picolisp.com/5000/-2.html). PicoLisp is included in some
 ;; GNU/Linux Distributions, and can be downloaded here:
-;; http://software-lab.de/down.html.  It ships with a picolisp-mode and
+;; https://software-lab.de/down.html.  It ships with a picolisp-mode and
 ;; an inferior-picolisp-mode for Emacs (to be found in the /lib/el/
 ;; directory).
 
diff --git a/lisp/ob-processing.el b/lisp/ob-processing.el
index 9e6572a5f..84fd6a296 100644
--- a/lisp/ob-processing.el
+++ b/lisp/ob-processing.el
@@ -47,7 +47,7 @@
 ;;; Requirements:
 
 ;; - processing2-emacs mode :: https://github.com/ptrv/processing2-emacs
-;; - Processing.js module :: http://processingjs.org/
+;; - Processing.js module :: https://processingjs.org/
 
 ;;; Code:
 (require 'ob)
diff --git a/lisp/ob-ruby.el b/lisp/ob-ruby.el
index ccc746e8d..b2483f1aa 100644
--- a/lisp/ob-ruby.el
+++ b/lisp/ob-ruby.el
@@ -27,7 +27,7 @@
 
 ;;; Requirements:
 
-;; - ruby and irb executables :: http://www.ruby-lang.org/
+;; - ruby and irb executables :: https://www.ruby-lang.org/
 ;;
 ;; - ruby-mode :: Can be installed through ELPA, or from
 ;;   https://github.com/eschulte/rinari/raw/master/util/ruby-mode.el
diff --git a/lisp/ob-sass.el b/lisp/ob-sass.el
index 76cdfd806..c8762caba 100644
--- a/lisp/ob-sass.el
+++ b/lisp/ob-sass.el
@@ -23,7 +23,7 @@
 
 ;;; Commentary:
 
-;; For more information on sass see http://sass-lang.com/
+;; For more information on sass see https://sass-lang.com/
 ;;
 ;; This accepts a 'file' header argument which is the target of the
 ;; compiled sass.  The default output type for sass evaluation is
diff --git a/lisp/ol-bibtex.el b/lisp/ol-bibtex.el
index 6b591218c..57b240d92 100644
--- a/lisp/ol-bibtex.el
+++ b/lisp/ol-bibtex.el
@@ -88,7 +88,7 @@
 ;;
 ;; - All Bibtex information is taken from the document compiled by
 ;;   Andrew Roberts from the Bibtex manual, available at
-;;   http://www.andy-roberts.net/res/writing/latex/bibentries.pdf
+;;   https://www.andy-roberts.net/res/writing/latex/bibentries.pdf
 ;;
 ;;; History:
 ;;
diff --git a/lisp/org-protocol.el b/lisp/org-protocol.el
index 726c1ca2b..6f8cf00e9 100644
--- a/lisp/org-protocol.el
+++ b/lisp/org-protocol.el
@@ -176,7 +176,7 @@ Possible properties are:
 
   :online-suffix     - the suffix to strip from the published URLs
   :working-suffix    - the replacement for online-suffix
-  :base-url          - the base URL, e.g. http://www.example.com/project/
+  :base-url          - the base URL, e.g. https://www.example.com/project/
                        Last slash required.
   :working-directory - the local working directory.  This is, what base-url will
                        be replaced with.
diff --git a/lisp/org-table.el b/lisp/org-table.el
index 4262718e6..143ed0f8a 100644
--- a/lisp/org-table.el
+++ b/lisp/org-table.el
@@ -6089,7 +6089,7 @@ supported.  It is also possible to use the following ones:
 
   When non-nil, use \"ascii-art-to-unicode\" package to translate
   the table.  You can download it here:
-  http://gnuvola.org/software/j/aa2u/ascii-art-to-unicode.el.
+  https://gnuvola.org/software/j/aa2u/ascii-art-to-unicode.el.
 
 :narrow
 
diff --git a/lisp/ox-html.el b/lisp/ox-html.el
index 6cb9a3bf4..80ad95c6c 100644
--- a/lisp/ox-html.el
+++ b/lisp/ox-html.el
@@ -1191,7 +1191,7 @@ You can also customize this for each buffer, using something like
 
 For further information about MathJax options, see the MathJax documentation:
 
-  http://docs.mathjax.org/"
+  https://docs.mathjax.org/"
   :group 'org-export-html
   :package-version '(Org . "8.3")
   :type '(list :greedy t
diff --git a/lisp/ox-latex.el b/lisp/ox-latex.el
index 376d27a07..da3c3f815 100644
--- a/lisp/ox-latex.el
+++ b/lisp/ox-latex.el
@@ -932,7 +932,7 @@ using customize, or with
   (add-to-list \\='org-latex-packages-alist \\='(\"newfloat\" \"minted\"))
 
 In addition, it is necessary to install pygments
-\(URL `http://pygments.org>'), and to configure the variable
+\(URL `https://pygments.org>'), and to configure the variable
 `org-latex-pdf-process' so that the -shell-escape option is
 passed to pdflatex.
 
diff --git a/lisp/ox.el b/lisp/ox.el
index 2c812ec9b..0253c1617 100644
--- a/lisp/ox.el
+++ b/lisp/ox.el
@@ -5483,7 +5483,7 @@ transcoding it."
      (apostrophe :utf-8 "’" :html "&rsquo;"))
     ("ru"
      ;; https://ru.wikipedia.org/wiki/%D0%9A%D0%B0%D0%B2%D1%8B%D1%87%D0%BA%D0%B8#.D0.9A.D0.B0.D0.B2.D1.8B.D1.87.D0.BA.D0.B8.2C_.D0.B8.D1.81.D0.BF.D0.BE.D0.BB.D1.8C.D0.B7.D1.83.D0.B5.D0.BC.D1.8B.D0.B5_.D0.B2_.D1.80.D1.83.D1.81.D1.81.D0.BA.D0.BE.D0.BC_.D1.8F.D0.B7.D1.8B.D0.BA.D0.B5
-     ;; http://www.artlebedev.ru/kovodstvo/sections/104/
+     ;; https://www.artlebedev.ru/kovodstvo/sections/104/
      (primary-opening :utf-8 "«" :html "&laquo;" :latex "{}<<"
 		      :texinfo "@guillemetleft{}")
      (primary-closing :utf-8 "»" :html "&raquo;" :latex ">>{}"