diff --git a/pkgs/development/libraries/haskell/unordered-containers/0.2.3.3.nix b/pkgs/development/libraries/haskell/unordered-containers/0.2.4.0.nix
similarity index 87%
rename from pkgs/development/libraries/haskell/unordered-containers/0.2.3.3.nix
rename to pkgs/development/libraries/haskell/unordered-containers/0.2.4.0.nix
index 03cdd824d29f..80d4686fef3b 100644
--- a/pkgs/development/libraries/haskell/unordered-containers/0.2.3.3.nix
+++ b/pkgs/development/libraries/haskell/unordered-containers/0.2.4.0.nix
@@ -4,8 +4,8 @@
 
 cabal.mkDerivation (self: {
   pname = "unordered-containers";
-  version = "0.2.3.3";
-  sha256 = "09sn19fk4smhf4zi3326wy2a62lh231k2nm8jd64j51arch42sdi";
+  version = "0.2.4.0";
+  sha256 = "1x6djgmawzq8i8spib729pdlpnxyi4gz4p08lyn6jhfqjq6fpsil";
   buildDepends = [ deepseq hashable ];
   testDepends = [
     ChasingBottoms hashable HUnit QuickCheck testFramework
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index e26e8330554d..22ca42ceceaa 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -169,7 +169,7 @@ let result = let callPackage = x : y : modifyPrio (newScope result.finalReturn x
     syb          = self.syb_0_4_1;
     text         = self.text_1_1_0_1;
     transformers = self.transformers_0_3_0_0;   # this has become a core package in GHC 7.7
-    unorderedContainers = self.unorderedContainers_0_2_3_3;
+    unorderedContainers = self.unorderedContainers_0_2_4_0;
     vector       = self.vector_0_10_9_1;
     xhtml        = self.xhtml_3000_2_1;
     zlib         = self.zlib_0_5_4_1;
@@ -2658,8 +2658,8 @@ let result = let callPackage = x : y : modifyPrio (newScope result.finalReturn x
   unlambda = callPackage ../development/libraries/haskell/unlambda {};
 
   unorderedContainers_0_2_3_0 = callPackage ../development/libraries/haskell/unordered-containers/0.2.3.0.nix {};
-  unorderedContainers_0_2_3_3 = callPackage ../development/libraries/haskell/unordered-containers/0.2.3.3.nix {};
-  unorderedContainers = self.unorderedContainers_0_2_3_3;
+  unorderedContainers_0_2_4_0 = callPackage ../development/libraries/haskell/unordered-containers/0.2.4.0.nix {};
+  unorderedContainers = self.unorderedContainers_0_2_4_0;
 
   uri = callPackage ../development/libraries/haskell/uri {};