diff --git a/adjunctions.cabal b/adjunctions.cabal
--- a/adjunctions.cabal
+++ b/adjunctions.cabal
@@ -1,6 +1,6 @@
 name:          adjunctions
 category:      Data Structures, Adjunctions
-version:       2.2
+version:       2.2.1
 license:       BSD3
 cabal-version: >= 1.6
 license-file:  LICENSE
@@ -29,17 +29,17 @@
   build-depends:
     array                  >= 0.3.0.2 && < 0.5,
     base                   >= 4       && < 5,
-    transformers           >= 0.3     && < 0.4,
-    mtl                    >= 2.1     && < 2.2,
+    transformers           >= 0.2     && < 0.4,
+    mtl                    >= 2.0.1   && < 2.2,
     containers             >= 0.3     && < 0.5,
     comonad                >= 1.1.1.3 && < 1.2,
     contravariant          >= 0.2.0.1 && < 0.3,
-    distributive           >= 0.2.1   && < 0.3,
+    distributive           >= 0.2.2   && < 0.3,
     semigroupoids          >= 1.3     && < 1.4,
     void                   >= 0.5.5.1 && < 0.6,
     keys                   >= 2.1.3   && < 2.2,
     comonad-transformers   >= 2.1     && < 2.2,
-    representable-functors >= 2.2     && < 2.3
+    representable-functors >= 2.2.1   && < 2.3
 
   exposed-modules:
     Data.Functor.Adjunction