diff --git a/.travis.yml b/.travis.yml
index 968390b..be7e6e0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,11 +2,17 @@ language: node_js
 dist: trusty
 sudo: required
 node_js: stable
+env:
+  - PATH=$HOME/purescript:$PATH
 install:
+  - 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
 script:
+  - bower install --production
   - npm run -s build
 after_success:
 - >-
diff --git a/bower.json b/bower.json
index 3d57243..c017433 100644
--- a/bower.json
+++ b/bower.json
@@ -17,6 +17,8 @@
     "package.json"
   ],
   "dependencies": {
-    "purescript-generics": "^4.0.0"
+    "purescript-either": "^4.0.0",
+    "purescript-prelude": "^4.0.0",
+    "purescript-strings": "^4.0.0"
   }
 }
diff --git a/package.json b/package.json
index 46af5de..5a4bff0 100644
--- a/package.json
+++ b/package.json
@@ -2,13 +2,12 @@
   "private": true,
   "scripts": {
     "clean": "rimraf output && rimraf .pulp-cache",
-    "build": "pulp build --censor-lib --strict",
+    "build": "pulp build -- --censor-lib --strict",
     "test": "pulp test"
   },
   "devDependencies": {
-    "pulp": "^11.0.0",
-    "purescript-psa": "^0.5.0",
-    "purescript": "^0.11.1",
-    "rimraf": "^2.6.1"
+    "pulp": "^12.2.0",
+    "purescript-psa": "^0.6.0",
+    "rimraf": "^2.6.2"
   }
 }
diff --git a/src/Data/HTTP/Method.purs b/src/Data/HTTP/Method.purs
index 5a61723..a6973cd 100644
--- a/src/Data/HTTP/Method.purs
+++ b/src/Data/HTTP/Method.purs
@@ -9,7 +9,6 @@ module Data.HTTP.Method
 import Prelude
 
 import Data.Either (Either(..), either)
-import Data.Generic (class Generic)
 import Data.String as Str
 
 data Method
@@ -37,7 +36,6 @@ data Method
 
 derive instance eqMethod :: Eq Method
 derive instance ordMethod :: Ord Method
-derive instance genericMethod :: Generic Method
 
 instance showMethod :: Show Method where
   show OPTIONS = "OPTIONS"
@@ -64,7 +62,6 @@ unCustomMethod (CustomMethod m) = m
 
 derive instance eqCustomMethod :: Eq CustomMethod
 derive instance ordCustomMethod :: Ord CustomMethod
-derive instance genericCustomMethod :: Generic CustomMethod
 
 instance showCustomMethod :: Show CustomMethod where
   show (CustomMethod m) = "(CustomMethod " <> show m <> ")"