diff --git a/representable-functors.cabal b/representable-functors.cabal
--- a/representable-functors.cabal
+++ b/representable-functors.cabal
@@ -1,6 +1,6 @@
 name:          representable-functors
 category:      Monads, Functors, Data Structures
-version:       2.0.0.3
+version:       2.0.0.4
 license:       BSD3
 cabal-version: >= 1.6
 license-file:  LICENSE
@@ -37,7 +37,7 @@
     contravariant >= 0.1.2 && < 0.2,
     distributive >= 0.2 && < 0.3,
     mtl >= 2.0.1.0 && < 2.1,
-    semigroups >= 0.5 && < 0.6,
+    semigroups >= 0.6 && < 0.7,
     semigroupoids >= 1.2.2 && < 1.3.0,
     transformers >= 0.2.0 && < 0.3,
     keys                 >= 1.8 && < 1.9,