diff --git a/pkgs/servers/web-apps/changedetection-io/default.nix b/pkgs/servers/web-apps/changedetection-io/default.nix
index 1316219daf76..9b1810fab8c3 100644
--- a/pkgs/servers/web-apps/changedetection-io/default.nix
+++ b/pkgs/servers/web-apps/changedetection-io/default.nix
@@ -3,60 +3,40 @@
 , fetchurl
 , python3
 }:
-let
-  py = python3.override {
-    packageOverrides = final: prev: {
-      flask = prev.flask.overridePythonAttrs (old: rec {
-        version = "2.1.3";
-        src = old.src.override {
-          inherit version;
-          hash = "sha256-FZcuUBffBXXD1sCQuhaLbbkCWeYgrI1+qBOjlrrVtss=";
-        };
-      });
-      flask-restful = prev.flask-restful.overridePythonAttrs (old: rec {
-        disabledTests = old.disabledTests or [ ] ++ [
-          # fails because of flask or werkzeug downgrade
-          "test_redirect"
-        ];
-      });
-      werkzeug = prev.werkzeug.overridePythonAttrs (old: rec {
-        version = "2.0.3";
-        src = old.src.override {
-          inherit version;
-          hash = "sha256-uGP4/wV8UiFktgZ8niiwQRYbS+W6TQ2s7qpQoWOCLTw=";
-        };
-      });
-    };
-  };
-in
-py.pkgs.buildPythonApplication rec {
+python3.pkgs.buildPythonApplication rec {
   pname = "changedetection-io";
-  version = "0.39.22.1";
+  version = "0.40.3";
   format = "setuptools";
 
   src = fetchFromGitHub {
     owner = "dgtlmoon";
     repo = "changedetection.io";
     rev = version;
-    sha256 = "sha256-qK44m64/skmeoBgHToTyOpeWUF2kgks10OHoAoLim+k=";
+    sha256 = "sha256-RYxhkCSL17rU3C4rOArYptmYpdK/CDPw9xfXkKja2xs=";
   };
 
   postPatch = ''
     substituteInPlace requirements.txt \
-      --replace "bs4" "beautifulsoup4" \
       --replace "cryptography~=3.4" "cryptography" \
-      --replace "selenium~=4.1.0" "selenium"
+      --replace "dnspython<2.3.0" "dnspython" \
+      --replace "pytest ~=6.2" "" \
+      --replace "pytest-flask ~=1.2" "" \
+      --replace "selenium~=4.1.0" "selenium" \
+      --replace "werkzeug~=2.0.0" "werkzeug"
   '';
 
-  propagatedBuildInputs = with py.pkgs; [
+  propagatedBuildInputs = with python3.pkgs; [
     apprise
     beautifulsoup4
     brotli
     chardet
     cryptography
+    dnspython
     eventlet
     feedgen
     flask
+    flask-compress
+    flask-expects-json
     flask-login
     flask-restful
     flask-wtf
@@ -83,7 +63,7 @@ py.pkgs.buildPythonApplication rec {
   # tests can currently not be run in one pytest invocation and without docker
   doCheck = false;
 
-  nativeCheckInputs = with py.pkgs; [
+  nativeCheckInputs = with python3.pkgs; [
     pytest-flask
     pytestCheckHook
   ];