diff --git a/pkgs/development/libraries/glibmm/default.nix b/pkgs/development/libraries/glibmm/default.nix
index 317de19f6703..30cb8d74d73b 100644
--- a/pkgs/development/libraries/glibmm/default.nix
+++ b/pkgs/development/libraries/glibmm/default.nix
@@ -13,11 +13,11 @@
 
 stdenv.mkDerivation rec {
   pname = "glibmm";
-  version = "2.66.7";
+  version = "2.66.8";
 
   src = fetchurl {
     url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
-    hash = "sha256-/gLB5fWCWUDYK1a27DGhLAbAXBWDz+Yvk00HY+HlQrM=";
+    hash = "sha256-ZPEdO5WiTiqNQWbs/1GHMPeezCciLvQfr3x+A0D8kyk=";
   };
 
   outputs = [