diff --git a/pkgs/by-name/at/atkmm/package.nix b/pkgs/by-name/at/atkmm/package.nix
index 5b793a06baaf..40929610a2ce 100644
--- a/pkgs/by-name/at/atkmm/package.nix
+++ b/pkgs/by-name/at/atkmm/package.nix
@@ -13,11 +13,11 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "atkmm";
-  version = "2.28.4";
+  version = "2.28.5";
 
   src = fetchurl {
     url = "mirror://gnome/sources/atkmm/${lib.versions.majorMinor finalAttrs.version}/atkmm-${finalAttrs.version}.tar.xz";
-    sha256 = "sha256-ChQqgSj4PAAe+4AU7kY+mnZgVO+EaGr5UxNeBNKP2rM=";
+    sha256 = "sha256-rkSRkqWColgqleBgKxXXkrvWOeg2M5uB75FqqHVArFw=";
   };
 
   outputs = [