diff --git a/pkgs/development/libraries/haskell/arithmoi/default.nix b/pkgs/development/libraries/haskell/arithmoi/default.nix
index 082745fadf07..e4d1f522bc11 100644
--- a/pkgs/development/libraries/haskell/arithmoi/default.nix
+++ b/pkgs/development/libraries/haskell/arithmoi/default.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self: {
   pname = "arithmoi";
-  version = "0.4.0.4";
-  sha256 = "1v8qn0gjvlds6ljm9sfzzi5w3gsf7x63z0r7hcs1rvn0n3acwz6y";
+  version = "0.4.1.0";
+  sha256 = "1xmwxmvl9l1fa2sgr4ff7al8b5d5136h4fq9r05abj3nfnx1a0iq";
   buildDepends = [ mtl random ];
   meta = {
     homepage = "https://bitbucket.org/dafis/arithmoi";