diff --git a/pkgs/development/libraries/haskell/monad-par/0.3.4.6.nix b/pkgs/development/libraries/haskell/monad-par/0.3.4.7.nix
similarity index 90%
rename from pkgs/development/libraries/haskell/monad-par/0.3.4.6.nix
rename to pkgs/development/libraries/haskell/monad-par/0.3.4.7.nix
index d43379da7f96..c9d6cf71ae57 100644
--- a/pkgs/development/libraries/haskell/monad-par/0.3.4.6.nix
+++ b/pkgs/development/libraries/haskell/monad-par/0.3.4.7.nix
@@ -8,8 +8,8 @@
 
 cabal.mkDerivation (self: {
   pname = "monad-par";
-  version = "0.3.4.6";
-  sha256 = "1k345fpq31jg0mvfk8ap03wscnx8dvlp65gr567vai9ym1ahk6zy";
+  version = "0.3.4.7";
+  sha256 = "12n27hs274nrfkpa6hx0gdkrc76wxzliqf53x6689idl363sdf13";
   buildDepends = [
     abstractDeque abstractPar deepseq monadParExtras mtl mwcRandom
     parallel
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index c7274f4be90d..99d4de51198d 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1709,8 +1709,8 @@ self : let callPackage = x : y : modifyPrio (newScope self x y); in
   monadIO = callPackage ../development/libraries/haskell/monadIO {};
 
   monadPar_0_1_0_3 = callPackage ../development/libraries/haskell/monad-par/0.1.0.3.nix {};
-  monadPar_0_3_4_6 = callPackage ../development/libraries/haskell/monad-par/0.3.4.6.nix {};
-  monadPar = self.monadPar_0_3_4_6;
+  monadPar_0_3_4_7 = callPackage ../development/libraries/haskell/monad-par/0.3.4.7.nix {};
+  monadPar = self.monadPar_0_3_4_7;
 
   monadParallel = callPackage ../development/libraries/haskell/monad-parallel {};