diff --git a/pkgs/development/libraries/haskell/gtksourceview2/default.nix b/pkgs/development/libraries/haskell/gtksourceview2/default.nix
index 756e1a1df978..492a343e2096 100644
--- a/pkgs/development/libraries/haskell/gtksourceview2/default.nix
+++ b/pkgs/development/libraries/haskell/gtksourceview2/default.nix
@@ -4,8 +4,8 @@
 
 cabal.mkDerivation (self: {
   pname = "gtksourceview2";
-  version = "0.12.3.1";
-  sha256 = "1c91ja753dzr2c7sv13wn47sjbjg45jv8xx9ybx1q3188xrldqng";
+  version = "0.12.5.0";
+  sha256 = "125psfr58na60nz5ax3va08fq1aa4knzjccj8ghwk8x9fkzddfs9";
   buildDepends = [ glib gtk mtl ];
   buildTools = [ gtk2hsBuildtools ];
   extraLibraries = [ libc pkgconfig ];