diff --git a/keys.cabal b/keys.cabal
--- a/keys.cabal
+++ b/keys.cabal
@@ -1,6 +1,6 @@
 name:          keys
 category:      Data Structures, Containers
-version:       1.8.0
+version:       1.8.0.1
 license:       BSD3
 cabal-version: >= 1.6
 license-file:  LICENSE
@@ -20,7 +20,7 @@
 library
   build-depends: 
     array >= 0.3.0.2 && < 0.4,
-    base >= 4 && < 4.4,
+    base >= 4 && < 5,
     containers >= 0.3 && < 0.5,
     semigroups >= 0.5 && < 0.6,
     semigroupoids >= 1.2.2 && < 1.3,