diff --git a/.travis.yml b/.travis.yml
index 0cf6108..5df003d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,6 +9,6 @@ rvm:
   - 2.1
   - 2.2
 env:
-  - TRAVIS_NODE_VERSION="7"
+  - TRAVIS_NODE_VERSION="8"
 notifications:
   email: false
diff --git a/package.json b/package.json
index 00ea877..3733665 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,7 @@
     "coffee-script": "^1.12.5",
     "coffeelint": "^1.16.0",
     "node-sass": "^4.5.2",
-    "phantomjs": "^1.9.19",
+    "phantomjs-prebuilt": "^2.1.16",
     "webpack": "^2.5.1"
   }
 }
diff --git a/task_list.gemspec b/task_list.gemspec
index 4a161d9..9a5a339 100644
--- a/task_list.gemspec
+++ b/task_list.gemspec
@@ -18,7 +18,7 @@ Gem::Specification.new do |gem|
 
   gem.required_ruby_version = ">= 2.0.0"
 
-  gem.add_dependency "activesupport", "~> 4.0" if RUBY_VERSION < '2.2.2'
+  gem.add_dependency "activesupport", ">= 4.0" if RUBY_VERSION < '2.2.2'
   gem.add_dependency "nokogiri", "~> 1.6.0" if RUBY_VERSION < '2.1.0'
   gem.add_dependency "html-pipeline"