diff --git a/pkgs/development/python-modules/mailmanclient/default.nix b/pkgs/development/python-modules/mailmanclient/default.nix
index e6233de93d1..247a7ed1b00 100644
--- a/pkgs/development/python-modules/mailmanclient/default.nix
+++ b/pkgs/development/python-modules/mailmanclient/default.nix
@@ -17,7 +17,7 @@ buildPythonPackage rec {
   pythonImportsCheck = [ "mailmanclient" ];
 
   meta = with stdenv.lib; {
-    homepage = "http://www.gnu.org/software/mailman/";
+    homepage = "https://www.gnu.org/software/mailman/";
     description = "REST client for driving Mailman 3";
     license = licenses.lgpl3;
     platforms = platforms.linux;