diff --git a/kan-extensions.cabal b/kan-extensions.cabal
--- a/kan-extensions.cabal
+++ b/kan-extensions.cabal
@@ -1,6 +1,6 @@
 name:          kan-extensions
 category:      Data Structures, Monads, Comonads, Functors
-version:       3.1
+version:       3.1.0.1
 license:       BSD3
 cabal-version: >= 1.6
 license-file:  LICENSE
@@ -43,7 +43,7 @@
     containers             >= 0.4     && < 0.6,
     contravariant          >= 0.2.0.1 && < 0.3,
     distributive           >= 0.2.2   && < 0.3,
-    free                   >= 3.0     && < 3.3,
+    free                   >= 3.0     && < 3.4,
     keys                   == 3.0.*,
     mtl                    >= 2.0.1   && < 2.2,
     representable-functors >= 3.0.0.1 && < 3.1,