diff --git a/bower.json b/bower.json
index 69250cd..dab9f5e 100644
--- a/bower.json
+++ b/bower.json
@@ -17,6 +17,6 @@
     "package.json"
   ],
   "dependencies": {
-    "purescript-eff": "^1.0.0"
+    "purescript-eff": "^2.0.0"
   }
 }
diff --git a/src/Control/Monad/Eff/Ref.js b/src/Control/Monad/Eff/Ref.js
index a0debc3..f42e7e5 100644
--- a/src/Control/Monad/Eff/Ref.js
+++ b/src/Control/Monad/Eff/Ref.js
@@ -1,8 +1,5 @@
-/* global exports */
 "use strict";
 
-// module Control.Monad.Eff.Ref
-
 exports.newRef = function (val) {
   return function () {
     return { value: val };
diff --git a/src/Control/Monad/Eff/Ref.purs b/src/Control/Monad/Eff/Ref.purs
index 28f1b52..bc193ea 100644
--- a/src/Control/Monad/Eff/Ref.purs
+++ b/src/Control/Monad/Eff/Ref.purs
@@ -7,7 +7,7 @@
 module Control.Monad.Eff.Ref where
 
 import Prelude (Unit, unit)
-import Control.Monad.Eff (Eff())
+import Control.Monad.Eff (Eff)
 
 -- | The effect associated with the use of global mutable variables.
 foreign import data REF :: !
diff --git a/src/Control/Monad/Eff/Ref/Unsafe.purs b/src/Control/Monad/Eff/Ref/Unsafe.purs
index ffb4a47..fec0c3d 100644
--- a/src/Control/Monad/Eff/Ref/Unsafe.purs
+++ b/src/Control/Monad/Eff/Ref/Unsafe.purs
@@ -2,9 +2,9 @@
 
 module Control.Monad.Eff.Ref.Unsafe where
 
-import Control.Monad.Eff (Eff())
+import Control.Monad.Eff (Eff)
 import Control.Monad.Eff.Ref (REF)
-import Control.Monad.Eff.Unsafe (unsafeInterleaveEff)
+import Control.Monad.Eff.Unsafe (unsafeCoerceEff)
 
 -- | This handler function unsafely removes the `Ref` effect from an
 -- | effectful action.
@@ -13,4 +13,4 @@ import Control.Monad.Eff.Unsafe (unsafeInterleaveEff)
 -- | typechecker that a particular mutable reference does not escape
 -- | its scope.
 unsafeRunRef :: forall eff a. Eff (ref :: REF | eff) a -> Eff eff a
-unsafeRunRef = unsafeInterleaveEff
+unsafeRunRef = unsafeCoerceEff