diff --git a/mcmc-types.cabal b/mcmc-types.cabal
--- a/mcmc-types.cabal
+++ b/mcmc-types.cabal
@@ -1,5 +1,5 @@
 name:                mcmc-types
-version:             1.0.1
+version:             1.0.2
 synopsis:            Common types for sampling.
 homepage:            http://github.com/jtobin/mcmc-types
 license:             MIT
@@ -31,8 +31,8 @@
   exposed-modules:     Data.Sampling.Types
   default-language:    Haskell2010
   build-depends:
-      base            < 5
-    , containers
+      base            >= 4 && < 6
+    , containers      >= 0.5 && < 6
     , mwc-probability >= 1.0.1
     , transformers