diff --git a/pkgs/development/libraries/haskell/threepenny-gui/default.nix b/pkgs/development/libraries/haskell/threepenny-gui/default.nix
index 70f96c8ac9d7..1855f4938120 100644
--- a/pkgs/development/libraries/haskell/threepenny-gui/default.nix
+++ b/pkgs/development/libraries/haskell/threepenny-gui/default.nix
@@ -1,17 +1,18 @@
-{ cabal, attoparsecEnumerator, dataDefault, deepseq, filepath
-, hashable, json, MonadCatchIOTransformers, network, safe, snapCore
-, snapServer, stm, text, time, transformers, unorderedContainers
-, utf8String, vault, websockets, websocketsSnap
+{ cabal, aeson, attoparsecEnumerator, dataDefault, deepseq
+, filepath, hashable, MonadCatchIOTransformers, network, safe
+, snapCore, snapServer, stm, text, time, transformers
+, unorderedContainers, utf8String, vault, websockets
+, websocketsSnap
 }:
 
 cabal.mkDerivation (self: {
   pname = "threepenny-gui";
-  version = "0.4.0.2";
-  sha256 = "0dx6jrpxvd6ypz314hmq8nngy0wjx3bwx3r9h1c6y70id31lr9pg";
+  version = "0.4.1.0";
+  sha256 = "0fafwnlbl96z9m5fr3wiyv090fga78cr9hrd4yd3vyiz44gfrpcw";
   isLibrary = true;
   isExecutable = true;
   buildDepends = [
-    attoparsecEnumerator dataDefault deepseq filepath hashable json
+    aeson attoparsecEnumerator dataDefault deepseq filepath hashable
     MonadCatchIOTransformers network safe snapCore snapServer stm text
     time transformers unorderedContainers utf8String vault websockets
     websocketsSnap