diff --git a/pkgs/development/libraries/haskell/attoparsec/default.nix b/pkgs/development/libraries/haskell/attoparsec/default.nix
index 06655fc6e5ae..b76545143d6a 100644
--- a/pkgs/development/libraries/haskell/attoparsec/default.nix
+++ b/pkgs/development/libraries/haskell/attoparsec/default.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self: {
   pname = "attoparsec";
-  version = "0.9.1.1";
-  sha256 = "1qkkl9pzk4znqh34pchmxbcslybvii35lkxhwf6445lyhj20356b";
+  version = "0.9.1.2";
+  sha256 = "0h9j4gn376k6j3v9l6pk7a4vxabkwk80043x6xlyxsh8p77jgj3v";
   buildDepends = [ deepseq ];
   meta = {
     homepage = "https://bitbucket.org/bos/attoparsec";