diff --git a/pkgs/development/libraries/haskell/uuid/default.nix b/pkgs/development/libraries/haskell/uuid/default.nix
index a1dbdf2f88d..5b74c74b490 100644
--- a/pkgs/development/libraries/haskell/uuid/default.nix
+++ b/pkgs/development/libraries/haskell/uuid/default.nix
@@ -4,8 +4,8 @@
 
 cabal.mkDerivation (self: {
   pname = "uuid";
-  version = "1.2.11";
-  sha256 = "0fr91w8jahb7ryhgl8dm6w8jg9sykn3m1jnfvyrfdpkpwkc0kpxx";
+  version = "1.2.12";
+  sha256 = "023954gx1hqf1v4qlzwy3nlxwn9yll0642p16w3vayrahcm27ljb";
   buildDepends = [ binary cryptohash maccatcher random time ];
   testDepends = [
     criterion deepseq HUnit mersenneRandomPure64 QuickCheck random