diff --git a/pkgs/development/libraries/haskell/yesod-json/default.nix b/pkgs/development/libraries/haskell/yesod-json/default.nix
index 1c46d7977aa7..4b1777676a82 100644
--- a/pkgs/development/libraries/haskell/yesod-json/default.nix
+++ b/pkgs/development/libraries/haskell/yesod-json/default.nix
@@ -5,8 +5,8 @@
 
 cabal.mkDerivation (self: {
   pname = "yesod-json";
-  version = "1.1.2";
-  sha256 = "0vbjg038vgdwd5a4w7r5261xgvylzzk4gikk4285ns471x8n0vrf";
+  version = "1.1.2.1";
+  sha256 = "0vrhn3v26q7cqwds99hqyibq09vyxnviqzgyn7w5ldnl3ycg7dqd";
   buildDepends = [
     aeson attoparsecConduit blazeBuilder conduit safe shakespeareJs
     text transformers vector wai waiExtra yesodCore yesodRoutes