diff --git a/.gitignore b/.gitignore
index 7050558..332b6cf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@
 /bower_components/
 /node_modules/
 /output/
+package-lock.json
diff --git a/LICENSE b/LICENSE
index d3249fe..311379c 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,20 +1,26 @@
-The MIT License (MIT)
+Copyright 2018 PureScript
 
-Copyright (c) 2015 PureScript
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
 
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal in
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
+1. Redistributions of source code must retain the above copyright notice, this
+list of conditions and the following disclaimer.
 
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
+2. Redistributions in binary form must reproduce the above copyright notice,
+this list of conditions and the following disclaimer in the documentation and/or
+other materials provided with the distribution.
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
-COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
-IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+3. Neither the name of the copyright holder nor the names of its contributors
+may be used to endorse or promote products derived from this software without
+specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/bower.json b/bower.json
index aefc25b..43250f5 100644
--- a/bower.json
+++ b/bower.json
@@ -1,8 +1,7 @@
 {
   "name": "purescript-effect",
   "homepage": "https://github.com/purescript/purescript-effect",
-  "description": "The Effect monad, for handling native side effects",
-  "license": "MIT",
+  "license": "BSD-3-Clause",
   "repository": {
     "type": "git",
     "url": "git://github.com/purescript/purescript-effect.git"
@@ -17,7 +16,6 @@
     "package.json"
   ],
   "dependencies": {
-    "purescript-prelude": "^3.0.0",
-    "purescript-monoid": "^3.3.0"
+    "purescript-prelude": "^4.0.0"
   }
 }
diff --git a/package.json b/package.json
index 26d81a7..02e36ea 100644
--- a/package.json
+++ b/package.json
@@ -5,9 +5,9 @@
     "build": "eslint src && pulp build -- --censor-lib --strict"
   },
   "devDependencies": {
-    "eslint": "^3.17.1",
-    "pulp": "^10.0.4",
-    "purescript-psa": "^0.5.0-rc.1",
-    "rimraf": "^2.6.1"
+    "eslint": "^4.19.1",
+    "pulp": "^12.2.0",
+    "purescript-psa": "^0.6.0",
+    "rimraf": "^2.6.2"
   }
 }
diff --git a/src/Effect.purs b/src/Effect.purs
index af60bcd..95a1e58 100644
--- a/src/Effect.purs
+++ b/src/Effect.purs
@@ -3,15 +3,9 @@ module Effect
   , untilE, whileE, forE, foreachE
   ) where
 
-import Control.Applicative (class Applicative, liftA1)
-import Control.Apply (class Apply, lift2)
-import Control.Bind (class Bind)
-import Control.Monad (class Monad, ap)
+import Prelude
 
-import Data.Functor (class Functor)
-import Data.Monoid (class Monoid, mempty)
-import Data.Semigroup (class Semigroup, append)
-import Data.Unit (Unit)
+import Control.Apply (lift2)
 
 -- | The `Effect` type constructor is used to represent _native_ effects.
 -- |
@@ -30,12 +24,6 @@ instance applyEffect :: Apply Effect where
 instance applicativeEffect :: Applicative Effect where
   pure = pureE
 
-instance semigroupEffect :: Semigroup a => Semigroup (Effect a) where
-  append = lift2 append
-
-instance monoidEffect :: Monoid a => Monoid (Effect a) where
-  mempty = pureE mempty
-
 foreign import pureE :: forall a. a -> Effect a
 
 instance bindEffect :: Bind Effect where
@@ -45,6 +33,12 @@ foreign import bindE :: forall a b. Effect a -> (a -> Effect b) -> Effect b
 
 instance monadEffect :: Monad Effect
 
+instance semigroupEffect :: Semigroup a => Semigroup (Effect a) where
+  append = lift2 append
+
+instance monoidEffect :: Monoid a => Monoid (Effect a) where
+  mempty = pureE mempty
+
 -- | Loop until a condition becomes `true`.
 -- |
 -- | `untilE b` is an effectful computation which repeatedly runs the effectful
diff --git a/src/Effect/Class.purs b/src/Effect/Class.purs
index 3962eec..6bdbd6b 100644
--- a/src/Effect/Class.purs
+++ b/src/Effect/Class.purs
@@ -1,6 +1,6 @@
 module Effect.Class where
 
-import Control.Category (id)
+import Control.Category (identity)
 import Control.Monad (class Monad)
 import Effect (Effect)
 
@@ -16,4 +16,4 @@ class Monad m <= MonadEffect m where
   liftEffect :: forall a. Effect a -> m a
 
 instance monadEffectEffect :: MonadEffect Effect where
-  liftEffect = id
+  liftEffect = identity