diff --git a/pkgs/development/libraries/gtkmm/4.x.nix b/pkgs/development/libraries/gtkmm/4.x.nix
index ffb2e123c87b..423d27a437e6 100644
--- a/pkgs/development/libraries/gtkmm/4.x.nix
+++ b/pkgs/development/libraries/gtkmm/4.x.nix
@@ -17,13 +17,13 @@
 
 stdenv.mkDerivation rec {
   pname = "gtkmm";
-  version = "4.8.0";
+  version = "4.9.3";
 
   outputs = [ "out" "dev" ];
 
   src = fetchurl {
     url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
-    sha256 = "yCeG1G4rBzRrY5fKfxkp2VL0ki+lyds97ghJi5oTbPU=";
+    sha256 = "uGCyNIIqAwHDCQHHHx3/364fX5skBNDafdtd7WG19L4=";
   };
 
   nativeBuildInputs = [