diff --git a/pkgs/development/libraries/glib/default.nix b/pkgs/development/libraries/glib/default.nix
index 0e41082bcbf..31026e07da5 100644
--- a/pkgs/development/libraries/glib/default.nix
+++ b/pkgs/development/libraries/glib/default.nix
@@ -39,7 +39,7 @@ let
     ln -sr -t "$out/include/" "$out"/lib/*/include/* 2>/dev/null || true
   '';
 
-  ver_maj = "2.40";
+  ver_maj = "2.42";
   ver_min = "0";
 in
 
@@ -48,7 +48,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "mirror://gnome/sources/glib/${ver_maj}/${name}.tar.xz";
-    sha256 = "1d98mbqjmc34s8095lkw1j1bwvnnkw9581yfvjaikjvfjsaz29qd";
+    sha256 = "94fbc0a7d10633433ff383e540607de649c1b46baaa59dea446a50977a6c4472";
   };
 
   patches = optional stdenv.isDarwin ./darwin-compilation.patch ++ optional doCheck ./skip-timer-test.patch;