diff --git a/either.cabal b/either.cabal
--- a/either.cabal
+++ b/either.cabal
@@ -1,6 +1,6 @@
 name:          either
 category:      Control, Monads
-version:       0.1
+version:       0.2.1
 license:       BSD3
 cabal-version: >= 1.6
 license-file:  LICENSE
@@ -21,8 +21,8 @@
   build-depends: 
     base >= 4 && < 4.4,
     data-default >= 0.2.0.1 && < 0.3,
-    semigroups >= 0.3.4 && < 0.4,
-    semigroupoids >= 1.1.1 && < 1.2,
+    semigroups >= 0.4 && < 0.5,
+    semigroupoids >= 1.1.3 && < 1.2,
     transformers >= 0.2.0 && <= 0.3
 
   extensions: CPP