diff --git a/sampling.cabal b/sampling.cabal
--- a/sampling.cabal
+++ b/sampling.cabal
@@ -1,5 +1,5 @@
 name:                sampling
-version:             0.3.0
+version:             0.3.1
 synopsis:            Sample values from collections.
 homepage:            https://github.com/jtobin/sampling
 license:             MIT
@@ -36,7 +36,7 @@
   exposed-modules:
       Numeric.Sampling
   build-depends:
-      base        > 4 && < 6
+      base        > 4.8 && < 5
     , containers  >= 0.5 && < 1
     , foldl       >= 1.1 && < 2
     , mwc-random  >= 0.13 && < 0.14