diff --git a/pkgs/development/libraries/haskell/yaml/default.nix b/pkgs/development/libraries/haskell/yaml/default.nix
index 2b25768aa69..e65737a94b9 100644
--- a/pkgs/development/libraries/haskell/yaml/default.nix
+++ b/pkgs/development/libraries/haskell/yaml/default.nix
@@ -4,8 +4,8 @@
 
 cabal.mkDerivation (self: {
   pname = "yaml";
-  version = "0.5.1.1";
-  sha256 = "1l3f1rbdajdf9944kwbf90a1wxv00g2jcgjkg54k6c3iqbx956w2";
+  version = "0.5.1.2";
+  sha256 = "0xmx58h47prpmgbf63bsy7ar74h0d968wyd2yg3bgvwmnd83iz7d";
   buildDepends = [
     aeson attoparsec conduit text transformers unorderedContainers
     vector