diff --git a/pkgs/by-name/gt/gtkmm4/package.nix b/pkgs/by-name/gt/gtkmm4/package.nix
index 62c759f438c2..f68769073f25 100644
--- a/pkgs/by-name/gt/gtkmm4/package.nix
+++ b/pkgs/by-name/gt/gtkmm4/package.nix
@@ -89,7 +89,7 @@ stdenv.mkDerivation (finalAttrs: {
       There's extensive documentation, including API reference and a
       tutorial.
     '';
-    homepage = "https://gtkmm.org/";
+    homepage = "https://gitlab.gnome.org/GNOME/gtkmm";
     license = lib.licenses.lgpl2Plus;
     teams = [ lib.teams.gnome ];
     platforms = lib.platforms.unix;