diff --git a/free-functors.cabal b/free-functors.cabal
--- a/free-functors.cabal
+++ b/free-functors.cabal
@@ -1,5 +1,5 @@
 name:                free-functors
-version:             0.6.2
+version:             0.6.3
 synopsis:            Provides free functors that are adjoint to functors that forget class constraints. 
 description:         A free functor is a left adjoint to a forgetful functor. It used to be the case
                      that the only category that was easy to work with in Haskell was Hask itself, so
@@ -43,8 +43,8 @@
   build-depends:
     base >= 4.4 && < 5,
     constraints >= 0.3.2 && < 0.4,
-    transformers >= 0.2.0.0 && < 0.4,
-    comonad >= 4.0 && < 4.1,
+    transformers >= 0.2.0.0 && < 0.5,
+    comonad >= 4.0 && < 4.3,
     void >= 0.4 && < 0.7,
     algebraic-classes >= 0.5 && < 0.6,
     template-haskell >= 2.8.0.0 && < 2.9.1