diff --git a/bower.json b/bower.json
index 562cf09..ca47812 100644
--- a/bower.json
+++ b/bower.json
@@ -21,6 +21,6 @@
   ],
   "dependencies": {
     "purescript-css": "^0.6.0",
-    "purescript-halogen": "^0.7.0"
+    "purescript-halogen": "^0.8.0"
   }
 }
diff --git a/package.json b/package.json
index 7b7e70e..ddf5273 100644
--- a/package.json
+++ b/package.json
@@ -2,11 +2,12 @@
   "private": true,
   "scripts": {
     "clean": "rimraf output && rimraf .pulp-cache",
-    "build": "pulp build"
+    "build": "pulp build --censor-lib --strict"
   },
   "devDependencies": {
-    "pulp": "^8.1.0",
+    "pulp": "^8.2.0",
     "purescript": "^0.8.5",
+    "purescript-psa": "^0.3.8",
     "rimraf": "^2.5.2"
   }
 }
diff --git a/src/Halogen/HTML/CSS.purs b/src/Halogen/HTML/CSS.purs
index d07366d..cda2879 100644
--- a/src/Halogen/HTML/CSS.purs
+++ b/src/Halogen/HTML/CSS.purs
@@ -20,7 +20,7 @@ import CSS.Render (render, renderedSheet, collect)
 import CSS.Stylesheet (CSS(), Rule(..), runS)
 
 import Halogen.HTML as H
-import Halogen.HTML.Core (HTML(), Prop(), IsProp, prop, propName, attrName)
+import Halogen.HTML.Core (HTML(), Prop(), class IsProp, prop, propName, attrName)
 import Halogen.HTML.Properties as P
 
 -- | A newtype for CSS styles