diff --git a/comonads-fd.cabal b/comonads-fd.cabal
--- a/comonads-fd.cabal
+++ b/comonads-fd.cabal
@@ -1,6 +1,6 @@
 name:          comonads-fd
 category:      Control, Comonads
-version:       2.1
+version:       2.1.1
 license:       BSD3
 cabal-version: >= 1.6
 license-file:  LICENSE
@@ -25,11 +25,11 @@
     UndecidableInstances
   build-depends:
     base                 >= 4       && < 5,
-    transformers         >= 0.3     && < 0.4,
-    mtl                  >= 2.1     && < 2.2,
+    transformers         >= 0.2     && < 0.4,
+    mtl                  >= 2.0     && < 2.2,
     semigroups           >= 0.8.2   && < 0.9,
     comonad              >= 1.1.1.3 && < 1.2,
-    comonad-transformers >= 2.1     && < 2.2
+    comonad-transformers >= 2.1.1   && < 2.2
 
   exposed-modules:
     Control.Comonad.Env