diff --git a/.travis.yml b/.travis.yml
index 7f150a3..d5bba8a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,14 @@ language: node_js
 dist: trusty
 sudo: required
 node_js: stable
+env:
+  - PATH=$HOME/purescript:$PATH
 install:
+  - npm install -g bower
+  - TAG=$(wget -q -O - https://github.com/purescript/purescript/releases/latest --server-response --max-redirect 0 2>&1 | sed -n -e 's/.*Location:.*tag\///p')
+  - wget -O $HOME/purescript.tar.gz https://github.com/purescript/purescript/releases/download/$TAG/linux64.tar.gz
+  - tar -xvf $HOME/purescript.tar.gz -C $HOME/
+  - chmod a+x $HOME/purescript
   - npm install -g bower
   - npm install
   - bower install --production
diff --git a/bower.json b/bower.json
index d5d0ffb..a4de691 100644
--- a/bower.json
+++ b/bower.json
@@ -17,11 +17,11 @@
     "package.json"
   ],
   "dependencies": {
-    "purescript-effect": "#compiler/0.12"
+    "purescript-effect": "^2.0.0"
   },
   "devDependencies": {
-    "purescript-assert": "#compiler/0.12",
-    "purescript-refs": "#compiler/0.12",
-    "purescript-console": "#compiler/0.12"
+    "purescript-assert": "^4.0.0",
+    "purescript-refs": "^4.0.0",
+    "purescript-console": "^4.1.0"
   }
 }
diff --git a/package.json b/package.json
index 5a71519..6615039 100644
--- a/package.json
+++ b/package.json
@@ -6,10 +6,9 @@
     "test": "pulp test"
   },
   "devDependencies": {
-    "eslint": "^3.19.0",
-    "pulp": "^11.0.0",
-    "purescript-psa": "^0.5.0",
-    "purescript": "^0.11.1",
-    "rimraf": "^2.6.1"
+    "eslint": "^4.19.1",
+    "pulp": "^12.2.0",
+    "purescript-psa": "^0.6.0",
+    "rimraf": "^2.6.2"
   }
 }
diff --git a/test/Main.purs b/test/Main.purs
index 71b66bd..832ea23 100644
--- a/test/Main.purs
+++ b/test/Main.purs
@@ -14,7 +14,7 @@ main = do
 
   void $ T.setTimeout 10 do
     C.log "timeout increment counter"
-    R.modify (_ + 1) counter
+    void $ R.modify (_ + 1) counter
 
   void $ T.setTimeout 50 do
     C.log "timeout check counter"
@@ -24,7 +24,7 @@ main = do
   void $ T.setTimeout 100 do
 
     t <- T.setTimeout 20 do
-      R.modify (_ + 1) counter
+      void $ R.modify (_ + 1) counter
 
     T.clearTimeout t
 
@@ -37,7 +37,7 @@ main = do
 
     i <- T.setInterval 20 do
       C.log "interval increment counter"
-      R.modify (_ + 1) counter
+      void $ R.modify (_ + 1) counter
 
     void $ T.setTimeout 90 do
       T.clearInterval i