diff --git a/pkgs/by-name/po/postfix/update.sh b/pkgs/by-name/po/postfix/update.sh
index eacb548bc002..edd52c5c5c54 100755
--- a/pkgs/by-name/po/postfix/update.sh
+++ b/pkgs/by-name/po/postfix/update.sh
@@ -5,6 +5,6 @@ set -eu -o pipefail
 
 # Expect the text in format of '<a href="official/postfix-3.7.4.tar.gz">Source code</a> |'
 # Stable release goes first.
-new_version="$(curl -s http://cdn.postfix.johnriley.me/mirrors/postfix-release/index.html |
+new_version="$(curl -s https://postfix-mirror.horus-it.com/postfix-release/index.html |
     pcregrep -o1 '"official/postfix-([0-9.]+)[.]tar[.]gz">' | head -n1)"
 update-source-version postfix "$new_version"