diff --git a/dequeue.cabal b/dequeue.cabal
--- a/dequeue.cabal
+++ b/dequeue.cabal
@@ -1,7 +1,7 @@
 Build-Type: Custom
 Name: dequeue
 Category: Data Structures
-Version: 0.1.3
+Version: 0.1.4
 Cabal-Version: >= 1.2
 Synopsis: A typeclass and an implementation for double-ended queues.
 Description:
@@ -14,7 +14,7 @@
 Author: Henry Bucklow
 Maintainer: Henry Bucklow <henry@elsie.org.uk>
 Tested-With: GHC==6.10
-Build-Depends: base <= 4.1, safe, QuickCheck
+Build-Depends: base < 5, safe, QuickCheck
 Exposed-Modules: Data.Dequeue
 Hs-Source-Dirs: src
 Extra-Source-Files: src/Tests.hs