diff --git a/speedy-slice.cabal b/speedy-slice.cabal
--- a/speedy-slice.cabal
+++ b/speedy-slice.cabal
@@ -1,5 +1,5 @@
 name:                speedy-slice
-version:             0.1.2
+version:             0.1.3
 synopsis:            Speedy slice sampling.
 homepage:            http://github.com/jtobin/speedy-slice
 license:             MIT
@@ -44,11 +44,11 @@
       Numeric.MCMC.Slice
   build-depends:
       base            <  5
-    , lens
+    , lens            >= 4 && < 5
     , primitive
     , mcmc-types      >= 1.0.1
     , mwc-probability >= 1.0.1
-    , pipes
+    , pipes           >= 4 && < 5
     , transformers
 
 Test-suite rosenbrock