diff --git a/pkgs/development/libraries/haskell/postgresql-simple/default.nix b/pkgs/development/libraries/haskell/postgresql-simple/default.nix
index 20222609cffa..b97830899873 100644
--- a/pkgs/development/libraries/haskell/postgresql-simple/default.nix
+++ b/pkgs/development/libraries/haskell/postgresql-simple/default.nix
@@ -5,8 +5,8 @@
 
 cabal.mkDerivation (self: {
   pname = "postgresql-simple";
-  version = "0.4.2.1";
-  sha256 = "1547n7rh0gsrjaa8f9lc4diljpps09kdf0gkm0cjf1gk2kr7lh94";
+  version = "0.4.2.2";
+  sha256 = "0ipwpggzgqsi8ii12pk4c1bmwv2y5yj6yvyh8ma9rsz9f081bzyy";
   buildDepends = [
     aeson attoparsec blazeBuilder blazeTextual hashable postgresqlLibpq
     scientific text time transformers uuid vector