diff --git a/data-category.cabal b/data-category.cabal
--- a/data-category.cabal
+++ b/data-category.cabal
@@ -1,5 +1,5 @@
 name:                data-category
-version:             0.5.1
+version:             0.5.1.0
 synopsis:            Category theory
 
 description:         Data-category is a collection of categories, and some categorical constructions on them.