diff --git a/pkgs/development/libraries/glib/default.nix b/pkgs/development/libraries/glib/default.nix
index de874a798b2..51ee2edb635 100644
--- a/pkgs/development/libraries/glib/default.nix
+++ b/pkgs/development/libraries/glib/default.nix
@@ -45,11 +45,11 @@ in
 
 stdenv.mkDerivation rec {
   pname = "glib";
-  version = "2.66.2";
+  version = "2.66.3";
 
   src = fetchurl {
     url = "mirror://gnome/sources/glib/${stdenv.lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
-    sha256 = "1i0pd8y6xz64qlzfj73wxyqp0x7x9j6mwf4gj6ggil4d9vnhnfgc";
+    sha256 = "1cdmyyycw2mf5s0f5sfd59q91223s4smcqi8n2fwrccwm5ji7wvr";
   };
 
   patches = optionals stdenv.isDarwin [