diff --git a/bower.json b/bower.json
index d36fe83..60c7536 100644
--- a/bower.json
+++ b/bower.json
@@ -13,12 +13,12 @@
     "url": "git://github.com/purescript-node/purescript-node-buffer"
   },
   "dependencies": {
-    "purescript-eff": "^2.0.0",
-    "purescript-maybe": "^2.0.0"
+    "purescript-eff": "^3.0.0",
+    "purescript-maybe": "^3.0.0"
   },
   "devDependencies": {
-    "purescript-assert": "^2.0.0",
-    "purescript-console": "^2.0.0",
-    "purescript-foldable-traversable": "^2.0.0"
+    "purescript-assert": "^3.0.0",
+    "purescript-console": "^3.0.0",
+    "purescript-foldable-traversable": "^3.0.0"
   }
 }
diff --git a/package.json b/package.json
index 913c2f7..fb92faf 100644
--- a/package.json
+++ b/package.json
@@ -1,13 +1,14 @@
 {
+  "name": "purescript-node-buffer",
   "private": true,
   "scripts": {
     "clean": "rimraf output && rimraf .pulp-cache",
-    "build": "pulp build --censor-lib --strict"
+    "build": "pulp build -- --censor-lib --strict"
   },
   "devDependencies": {
-    "pulp": "^9.0.1",
-    "purescript-psa": "^0.3.9",
-    "purescript": "^0.10.1",
-    "rimraf": "^2.5.4"
+    "pulp": "^11.0.0",
+    "purescript-psa": "^0.5.0",
+    "purescript": "^0.11.1",
+    "rimraf": "^2.6.1"
   }
 }
diff --git a/src/Node/Buffer.purs b/src/Node/Buffer.purs
index e07bc23..0a5f7dd 100644
--- a/src/Node/Buffer.purs
+++ b/src/Node/Buffer.purs
@@ -23,7 +23,7 @@ module Node.Buffer
   ) where
 
 import Prelude
-import Control.Monad.Eff (Eff)
+import Control.Monad.Eff (Eff, kind Effect)
 import Data.Maybe (Maybe(..))
 import Node.Encoding (Encoding, encodingToNode)
 
@@ -35,7 +35,7 @@ type Octet = Int
 type Offset = Int
 
 -- | An instance of Node's Buffer class.
-foreign import data Buffer :: *
+foreign import data Buffer :: Type
 
 instance showBuffer :: Show Buffer where
   show = showImpl
@@ -43,7 +43,7 @@ instance showBuffer :: Show Buffer where
 foreign import showImpl :: Buffer -> String
 
 -- | Effect for buffer creation, reading, or writing.
-foreign import data BUFFER :: !
+foreign import data BUFFER :: Effect
 
 -- | Enumeration of the numeric types that can be written to a buffer.
 data BufferValueType
diff --git a/test/Main.purs b/test/Main.purs
index b569898..a3f6994 100644
--- a/test/Main.purs
+++ b/test/Main.purs
@@ -131,7 +131,7 @@ testGetAtOffset = do
   assertEq Nothing  =<< getAtOffset 4 buf
   assertEq Nothing  =<< getAtOffset (-1) buf
 
-assertEq :: forall a. (Eq a, Show a) => a -> a -> Test
+assertEq :: forall a. Eq a => Show a => a -> a -> Test
 assertEq x y =
   if x == y
     then pure unit