diff --git a/mwc-probability.cabal b/mwc-probability.cabal
--- a/mwc-probability.cabal
+++ b/mwc-probability.cabal
@@ -1,5 +1,5 @@
 name:                mwc-probability
-version:             1.0.1
+version:             1.0.2
 homepage:            http://github.com/jtobin/mwc-probability
 license:             MIT
 license-file:        LICENSE
@@ -53,8 +53,8 @@
   default-language:    Haskell2010
   hs-source-dirs:      src
   build-depends:
-      base          < 5
-    , mwc-random
+      base          <  5
+    , mwc-random    >= 0.13 && < 0.14
     , primitive
     , transformers