diff --git a/CHANGES.markdown b/CHANGES.markdown
--- a/CHANGES.markdown
+++ b/CHANGES.markdown
@@ -1,3 +1,8 @@
+0.4.2.1 (16 January 2016)
+-------------------------
+
+  - Allow `transformers-compat-0.5`.
+
 0.4.2 (16 January 2016)
 -----------------------
 
diff --git a/MonadRandom.cabal b/MonadRandom.cabal
--- a/MonadRandom.cabal
+++ b/MonadRandom.cabal
@@ -1,5 +1,5 @@
 name:                MonadRandom
-version:             0.4.2
+version:             0.4.2.1
 synopsis:            Random-number generation monad.
 description:         Support for computations which consume random values.
 license:             OtherLicense
@@ -19,7 +19,7 @@
   exposed-modules:     Control.Monad.Random, Control.Monad.Random.Class
   build-depends:       base >= 2 && < 5,
                        transformers >= 0.3 && < 0.5,
-                       transformers-compat == 0.4.*,
+                       transformers-compat >= 0.4 && < 0.6,
                        mtl >= 2.1 && < 2.3,
                        random
   ghc-options:         -Wall