diff --git a/pkgs/development/libraries/haskell/async/default.nix b/pkgs/development/libraries/haskell/async/default.nix
index ca759009817f..499dc394ece1 100644
--- a/pkgs/development/libraries/haskell/async/default.nix
+++ b/pkgs/development/libraries/haskell/async/default.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self: {
   pname = "async";
-  version = "2.0.1.1";
-  sha256 = "132xr0sb3j02s134my4p7khj95d3v3jlpxqjrgn6h8brw0gp6wcq";
+  version = "2.0.1.2";
+  sha256 = "03mmrs1xrw91pv9xpas8acxvrh4j6bq5l24bqk4vmaq2pdy9snn3";
   buildDepends = [ stm ];
   meta = {
     homepage = "https://github.com/simonmar/async";