diff --git a/pkgs/development/libraries/haskell/digestive-functors-heist/default.nix b/pkgs/development/libraries/haskell/digestive-functors-heist/default.nix
index 92eadc44fcf..2c2e95913b8 100644
--- a/pkgs/development/libraries/haskell/digestive-functors-heist/default.nix
+++ b/pkgs/development/libraries/haskell/digestive-functors-heist/default.nix
@@ -1,10 +1,10 @@
-{ cabal, digestiveFunctors, heist, text, xmlhtml }:
+{ cabal, digestiveFunctors, heist, mtl, text, xmlhtml }:
 
 cabal.mkDerivation (self: {
   pname = "digestive-functors-heist";
-  version = "0.5.1.0";
-  sha256 = "1rycf6y1c0car2m71iia929si5iqpc2rdyyxzp326q0rgj94whpk";
-  buildDepends = [ digestiveFunctors heist text xmlhtml ];
+  version = "0.5.1.1";
+  sha256 = "0jdg35xrikqg3r0rziv71g619vnmn8fzsv63b73m72fbj5xvy881";
+  buildDepends = [ digestiveFunctors heist mtl text xmlhtml ];
   meta = {
     homepage = "http://github.com/jaspervdj/digestive-functors";
     description = "Heist frontend for the digestive-functors library";