diff --git a/pkgs/development/libraries/glibmm/2.68.nix b/pkgs/development/libraries/glibmm/2.68.nix
index 50eff9cb2a7b..187ca8655962 100644
--- a/pkgs/development/libraries/glibmm/2.68.nix
+++ b/pkgs/development/libraries/glibmm/2.68.nix
@@ -13,13 +13,13 @@
 
 stdenv.mkDerivation rec {
   pname = "glibmm";
-  version = "2.77.0";
+  version = "2.78.0";
 
   outputs = [ "out" "dev" ];
 
   src = fetchurl {
     url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
-    sha256 = "sha256-fLNGhOesbfv4NJKlLf8/kZ4v/2PreBBhO/cesnLVRQ4=";
+    sha256 = "sha256-XS6HJWSZbwKgbYu6w2d+fDlK+LAN0VJq69R6+EKj71A=";
   };
 
   nativeBuildInputs = [