diff --git a/rhine-bayes.cabal b/rhine-bayes.cabal
--- a/rhine-bayes.cabal
+++ b/rhine-bayes.cabal
@@ -1,5 +1,5 @@
 name: rhine-bayes
-version: 1.4
+version: 1.4.0.1
 synopsis: monad-bayes backend for Rhine
 description:
   This package provides a backend to the @monad-bayes@ library,
@@ -37,7 +37,7 @@
     log-domain >=0.12,
     mmorph ^>=1.2,
     monad-bayes ^>=1.3,
-    rhine ==1.4,
+    rhine ^>=1.4,
     transformers >=0.5
 
   hs-source-dirs: src
@@ -72,7 +72,7 @@
     monad-bayes,
     rhine,
     rhine-bayes,
-    rhine-gloss ==1.4,
+    rhine-gloss ^>=1.4,
     time,
     transformers