diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 See full history at: <https://github.com/faylang/fay/commits>
 
+## 0.20.0.1 (2014-05-08)
+
+* Allow `transformers >= 0.4.1 && < 0.5`
+
 ## 0.20.0.0 (2014-04-29)
 
 * Adds support for LambdaCase and MultiWayIf
diff --git a/fay.cabal b/fay.cabal
--- a/fay.cabal
+++ b/fay.cabal
@@ -1,5 +1,5 @@
 name:                fay
-version:             0.20.0.0
+version:             0.20.0.1
 synopsis:            A compiler for Fay, a Haskell subset that compiles to JavaScript.
 description:         Fay is a proper subset of Haskell which is type-checked
                      with GHC, and compiled to JavaScript. It is lazy, pure, has a Fay monad,
@@ -128,7 +128,7 @@
     , spoon < 0.4
     , syb < 0.5
     , text < 1.2
-    , transformers == 0.3.*
+    , transformers >= 0.3 && < 0.4 || > 0.4.1 && < 0.5
     , uniplate >= 1.6.11 && < 1.7
     , unordered-containers < 0.3
     , utf8-string < 0.4