diff --git a/pkgs/development/libraries/haskell/clientsession/default.nix b/pkgs/development/libraries/haskell/clientsession/default.nix
index 166e261836f..2c577fbc2ef 100644
--- a/pkgs/development/libraries/haskell/clientsession/default.nix
+++ b/pkgs/development/libraries/haskell/clientsession/default.nix
@@ -1,17 +1,16 @@
-{ cabal, base64Bytestring, cereal, cryptoApi, cryptocipher
-, cryptohash
+{ cabal, base64Bytestring, cereal, cryptoApi, cryptocipher, skein
 }:
 
 cabal.mkDerivation (self: {
   pname = "clientsession";
-  version = "0.7.2";
-  sha256 = "0jfpgzfgcmc80qrzxj6dsg6cbd97pscg5yp99c9f58m4igr3fb2q";
+  version = "0.7.3";
+  sha256 = "1f5ri7h8l3v60bj6ywhn2v3kih5lclk76qx7y6jc7nyf9499aja5";
   buildDepends = [
-    base64Bytestring cereal cryptoApi cryptocipher cryptohash
+    base64Bytestring cereal cryptoApi cryptocipher skein
   ];
   meta = {
     homepage = "http://github.com/snoyberg/clientsession/tree/master";
-    description = "Store session data in a cookie";
+    description = "Securely store session data in a client-side cookie";
     license = self.stdenv.lib.licenses.bsd3;
     platforms = self.ghc.meta.platforms;
     maintainers = [