diff --git a/keys.cabal b/keys.cabal
--- a/keys.cabal
+++ b/keys.cabal
@@ -1,6 +1,6 @@
 name:          keys
 category:      Data Structures, Containers
-version:       2.1.3.2
+version:       2.2
 license:       BSD3
 cabal-version: >= 1.6
 license-file:  LICENSE
@@ -29,7 +29,7 @@
     semigroupoids        >= 1.3.1.2 && < 1.4,
     comonad-transformers >= 2.1.1.1 && < 2.2,
     comonads-fd          >= 2.1.1.1 && < 2.2,
-    free                 >= 2.1.1   && < 2.2
+    free                 >= 2.2     && < 2.3
 
   exposed-modules:
     Data.Key