diff --git a/pkgs/development/libraries/gtkmm/3.x.nix b/pkgs/development/libraries/gtkmm/3.x.nix
index 2d0921cf097..420dee6cbaa 100644
--- a/pkgs/development/libraries/gtkmm/3.x.nix
+++ b/pkgs/development/libraries/gtkmm/3.x.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   pname = "gtkmm";
-  version = "3.24.5";
+  version = "3.24.6";
 
   src = fetchurl {
     url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
-    sha256 = "1ri2msp3cmzi6r65ghwb8gfavfaxv0axpwi3q60nm7v8hvg36qw5";
+    sha256 = "Sz4ULpROFjO7oAiQBgXDQak8/XVaf6KgCwXQQTQfEdY=";
   };
 
   outputs = [ "out" "dev" ];