diff --git a/pkgs/development/libraries/haskell/happstack/happstack-hamlet.nix b/pkgs/development/libraries/haskell/happstack/happstack-hamlet.nix
index 3eccba4eb381..edd9b19b067b 100644
--- a/pkgs/development/libraries/haskell/happstack/happstack-hamlet.nix
+++ b/pkgs/development/libraries/haskell/happstack/happstack-hamlet.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self: {
   pname = "happstack-hamlet";
-  version = "6.2.0";
-  sha256 = "1y3nc6z9y96fci25dc6w66l0qlnkz29kr29dpd2sjnhpqm0kvzsc";
+  version = "6.2.1";
+  sha256 = "1ypw3lcrbkfkk8k45642kmgj0wjwz7vi3szslii6dirycg99jwkv";
   buildDepends = [ hamlet happstackServer text ];
   meta = {
     homepage = "http://www.happstack.com/";