diff --git a/pkgs/development/libraries/haskell/happstack/happstack-server.nix b/pkgs/development/libraries/haskell/happstack/happstack-server.nix
index 3ea0262a6f4..28520ceae0f 100644
--- a/pkgs/development/libraries/haskell/happstack/happstack-server.nix
+++ b/pkgs/development/libraries/haskell/happstack/happstack-server.nix
@@ -7,8 +7,8 @@
 
 cabal.mkDerivation (self: {
   pname = "happstack-server";
-  version = "7.1.7";
-  sha256 = "1gd7qa224z04aya44fdrbhpiy5iw88wjcvqihz6l95ks9ilbzmg7";
+  version = "7.1.7.1";
+  sha256 = "1q897av0ynfh6jn4jhmmamkwda7zg36p4ncn9yic69calzvjpz72";
   buildDepends = [
     base64Bytestring blazeHtml extensibleExceptions filepath hslogger
     html monadControl mtl network parsec sendfile syb systemFilepath