diff --git a/Data/ConcreteTypeRep.hs b/Data/ConcreteTypeRep.hs
--- a/Data/ConcreteTypeRep.hs
+++ b/Data/ConcreteTypeRep.hs
@@ -35,7 +35,7 @@
 
 import Control.Applicative((<$>))
 
--- | Abstract type providing the functionality of 'TypeRep', but additionally supporting hashing and serialization. 
+-- | Abstract type providing the functionality of 'TypeRep', but additionally supporting hashing and serialization.
 --
 -- The 'Eq' instance is just the 'Eq' instance for 'TypeRep', so an analogous guarantee holds: @'cTypeOf' a == 'cTypeOf' b@ if and only if @a@ and @b@ have the same type.
 -- The hashing and serialization functions preserve this equality.
@@ -57,13 +57,13 @@
 instance Show ConcreteTypeRep where
   showsPrec i = showsPrec i . unCTR
 
-    
+
 -- | This instance is guaranteed to be consistent for a single run of the program, but not for multiple runs.
 instance Hashable ConcreteTypeRep where
 #ifdef NEW_TYPEREP
-  hash (CTR (TypeRep (Fingerprint w1 w2) _ _)) = hash (w1, w2)
+  hashWithSalt salt (CTR (TypeRep (Fingerprint w1 w2) _ _)) = salt `hashWithSalt` w1 `hashWithSalt` w2
 #else
-  hash = unsafePerformIO . typeRepKey . toTypeRep
+  hashWithSalt salt ctr = hashWithSalt salt (unsafePerformIO . typeRepKey . toTypeRep $ ctr)
 #endif
 
 ------------- serialization: this uses Gökhan San's construction, from
@@ -83,7 +83,7 @@
 newtype SerialRep = SR (TyConRep, [SerialRep]) deriving(Binary)
 
 toSerial :: ConcreteTypeRep -> SerialRep
-toSerial (CTR t) = 
+toSerial (CTR t) =
   case splitTyConApp t of
     (con, args) -> SR (toTyConRep con, map (toSerial . CTR) args)
 
diff --git a/concrete-typerep.cabal b/concrete-typerep.cabal
--- a/concrete-typerep.cabal
+++ b/concrete-typerep.cabal
@@ -1,5 +1,5 @@
 Name:                concrete-typerep
-Version:             0.1.0.1
+Version:             0.1.0.2
 Synopsis:            Binary and Hashable instances for TypeRep
 Description:         Binary and Hashable instances for TypeRep
 License:             BSD3
@@ -17,7 +17,7 @@
 Library
   Exposed-modules:     Data.ConcreteTypeRep
 
-  Build-depends:       binary, hashable
+  Build-depends:       binary, hashable < 1.3
 
   if flag(new-typerep)
      Build-depends: base >= 4.4 && < 5, ghc >= 7.2
@@ -29,7 +29,7 @@
   type: exitcode-stdio-1.0
   Main-is: Main.hs
   hs-source-dirs: tests
-  build-depends: 
+  build-depends:
       base,
       binary,
       concrete-typerep,
@@ -37,5 +37,4 @@
       test-framework,
       test-framework-quickcheck2,
       QuickCheck >= 2.4
-      
-      
+