diff --git a/pkgs/development/libraries/haskell/yesod-form/default.nix b/pkgs/development/libraries/haskell/yesod-form/default.nix
index c6ce1d024c1..2f384e2e878 100644
--- a/pkgs/development/libraries/haskell/yesod-form/default.nix
+++ b/pkgs/development/libraries/haskell/yesod-form/default.nix
@@ -5,8 +5,8 @@
 
 cabal.mkDerivation (self: {
   pname = "yesod-form";
-  version = "0.3.4.1";
-  sha256 = "0khkc4bpqfgfs0zl753x4l5qpkfr8hv0kwzz6qpry5skxa326q6i";
+  version = "0.3.4.2";
+  sha256 = "1ahkbycxvjh1yvxfbf8wg6mlklmwm8hmy15x0b07g2xq7h1jmc5i";
   buildDepends = [
     blazeBuilder blazeHtml dataDefault emailValidate hamlet network
     persistent shakespeareCss shakespeareJs text time transformers wai