diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,5 @@
+1.2.4: Added constraint (thanks schell!)
+
 1.2.3: Fixing exports
 
 1.2.2: Added runKey utility function
diff --git a/HMap.cabal b/HMap.cabal
--- a/HMap.cabal
+++ b/HMap.cabal
@@ -1,5 +1,5 @@
 Name:                HMap
-Version:             1.2.3
+Version:             1.2.4
 Synopsis:	     Fast heterogeneous maps and unconstrained typeable like functionality.
 Description:         Fast heterogeneous maps based on Hashmaps and type-able like functionality for type that are not typeable.
 License:             BSD3