diff --git a/pkgs/development/libraries/gtkmm/3.x.nix b/pkgs/development/libraries/gtkmm/3.x.nix
index 1d3f15ba9871..c09f05b43772 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 = "3.24.8";
+  version = "3.24.9";
 
   src = fetchurl {
     url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
-    sha256 = "0pQMZJIuW5WFVLI9TEHRg56p5D4NLls4Gc+0aCSgmMQ=";
+    sha256 = "MNW/5ARXHOVmqOk4yLrBdXZCDrUI8eJXg32mPxStRM4=";
   };
 
   outputs = [ "out" "dev" ];