diff --git a/science/udunits/Makefile b/science/udunits/Makefile
index 5cc528db4352..e3c835f1a8de 100644
--- a/science/udunits/Makefile
+++ b/science/udunits/Makefile
@@ -2,7 +2,7 @@
 # $FreeBSD$
 
 PORTNAME=	udunits
-PORTVERSION=	2.2.21
+PORTVERSION=	2.2.23
 CATEGORIES=	science math
 MASTER_SITES=	ftp://ftp.unidata.ucar.edu/pub/udunits/ \
 		LOCAL/sunpoet
diff --git a/science/udunits/distinfo b/science/udunits/distinfo
index 39a6a540c6d6..5bfb831fd12f 100644
--- a/science/udunits/distinfo
+++ b/science/udunits/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1484060082
-SHA256 (udunits-2.2.21.tar.gz) = 9b75f5ff0484adddbaf04924e8af3d3c9fb4b31cc5524c3d4b80b4c1307d1a7d
-SIZE (udunits-2.2.21.tar.gz) = 1000402
+TIMESTAMP = 1485066732
+SHA256 (udunits-2.2.23.tar.gz) = 797227219df63df5e6cca3e3ca98245781e56f2334bf73649bee63b4b31c4979
+SIZE (udunits-2.2.23.tar.gz) = 1006611