diff --git a/pkgs/development/libraries/haskell/persistent-mysql/default.nix b/pkgs/development/libraries/haskell/persistent-mysql/default.nix
index f941aa617f8a..a63ef8c7b39c 100644
--- a/pkgs/development/libraries/haskell/persistent-mysql/default.nix
+++ b/pkgs/development/libraries/haskell/persistent-mysql/default.nix
@@ -6,8 +6,8 @@
 
 cabal.mkDerivation (self: {
   pname = "persistent-mysql";
-  version = "2.0.3";
-  sha256 = "1c2lnd0gi4m9idhdh8frpcvazdx5xblqm2hzzqq5krz6h6zqlfwa";
+  version = "2.0.4";
+  sha256 = "098fh3wiqq9frw3v8rmsr0n7raq81p0fmi3an0jh7h4k0b2vz2gc";
   buildDepends = [
     aeson blazeBuilder conduit monadControl monadLogger mysql
     mysqlSimple persistent resourcet text transformers