diff --git a/.ruby-version b/.ruby-version
index c043eea..b1b25a5 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.2.1
+2.2.2
diff --git a/.travis.yml b/.travis.yml
index 50aecf8..c08ea2a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,8 +2,8 @@ cache: bundler
 language: ruby
 rvm:
   - 2.0.0
-  - 2.1.5
-  - 2.2.1
+  - 2.1.6
+  - 2.2.2
   - ruby-head
 
 gemfile:
diff --git a/Gemfile.lock b/Gemfile.lock
index 218e7d6..8666dc6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,42 +1,42 @@
 PATH
   remote: .
   specs:
-    acl9 (1.2.1)
+    acl9 (1.3.0)
       rails (~> 4.0)
 
 GEM
   remote: http://rubygems.org/
   specs:
-    actionmailer (4.2.0)
-      actionpack (= 4.2.0)
-      actionview (= 4.2.0)
-      activejob (= 4.2.0)
+    actionmailer (4.2.1)
+      actionpack (= 4.2.1)
+      actionview (= 4.2.1)
+      activejob (= 4.2.1)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 1.0, >= 1.0.5)
-    actionpack (4.2.0)
-      actionview (= 4.2.0)
-      activesupport (= 4.2.0)
-      rack (~> 1.6.0)
+    actionpack (4.2.1)
+      actionview (= 4.2.1)
+      activesupport (= 4.2.1)
+      rack (~> 1.6)
       rack-test (~> 0.6.2)
       rails-dom-testing (~> 1.0, >= 1.0.5)
       rails-html-sanitizer (~> 1.0, >= 1.0.1)
-    actionview (4.2.0)
-      activesupport (= 4.2.0)
+    actionview (4.2.1)
+      activesupport (= 4.2.1)
       builder (~> 3.1)
       erubis (~> 2.7.0)
       rails-dom-testing (~> 1.0, >= 1.0.5)
       rails-html-sanitizer (~> 1.0, >= 1.0.1)
-    activejob (4.2.0)
-      activesupport (= 4.2.0)
+    activejob (4.2.1)
+      activesupport (= 4.2.1)
       globalid (>= 0.3.0)
-    activemodel (4.2.0)
-      activesupport (= 4.2.0)
+    activemodel (4.2.1)
+      activesupport (= 4.2.1)
       builder (~> 3.1)
-    activerecord (4.2.0)
-      activemodel (= 4.2.0)
-      activesupport (= 4.2.0)
+    activerecord (4.2.1)
+      activemodel (= 4.2.1)
+      activesupport (= 4.2.1)
       arel (~> 6.0)
-    activesupport (4.2.0)
+    activesupport (4.2.1)
       i18n (~> 0.7)
       json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
@@ -53,16 +53,15 @@ GEM
       simplecov (>= 0.7.1, < 1.0.0)
     docile (1.1.5)
     erubis (2.7.0)
-    globalid (0.3.0)
+    globalid (0.3.5)
       activesupport (>= 4.1.0)
-    hike (1.2.3)
     i18n (0.7.0)
     json (1.8.1)
-    loofah (2.0.1)
+    loofah (2.0.2)
       nokogiri (>= 1.5.9)
     mail (2.6.3)
       mime-types (>= 1.16, < 3)
-    mime-types (2.4.3)
+    mime-types (2.5)
     mini_portile (0.6.2)
     minitap (0.5.3)
       minitest (~> 5.0)
@@ -74,31 +73,31 @@ GEM
     multi_json (1.10.1)
     nokogiri (1.6.6.2)
       mini_portile (~> 0.6.0)
-    rack (1.6.0)
+    rack (1.6.1)
     rack-test (0.6.3)
       rack (>= 1.0)
-    rails (4.2.0)
-      actionmailer (= 4.2.0)
-      actionpack (= 4.2.0)
-      actionview (= 4.2.0)
-      activejob (= 4.2.0)
-      activemodel (= 4.2.0)
-      activerecord (= 4.2.0)
-      activesupport (= 4.2.0)
+    rails (4.2.1)
+      actionmailer (= 4.2.1)
+      actionpack (= 4.2.1)
+      actionview (= 4.2.1)
+      activejob (= 4.2.1)
+      activemodel (= 4.2.1)
+      activerecord (= 4.2.1)
+      activesupport (= 4.2.1)
       bundler (>= 1.3.0, < 2.0)
-      railties (= 4.2.0)
+      railties (= 4.2.1)
       sprockets-rails
     rails-deprecated_sanitizer (1.0.3)
       activesupport (>= 4.2.0.alpha)
-    rails-dom-testing (1.0.5)
+    rails-dom-testing (1.0.6)
       activesupport (>= 4.2.0.beta, < 5.0)
       nokogiri (~> 1.6.0)
       rails-deprecated_sanitizer (>= 1.0.1)
-    rails-html-sanitizer (1.0.1)
+    rails-html-sanitizer (1.0.2)
       loofah (~> 2.0)
-    railties (4.2.0)
-      actionpack (= 4.2.0)
-      activesupport (= 4.2.0)
+    railties (4.2.1)
+      actionpack (= 4.2.1)
+      activesupport (= 4.2.1)
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     rake (10.4.2)
@@ -107,12 +106,9 @@ GEM
       multi_json (~> 1.0)
       simplecov-html (~> 0.8.0)
     simplecov-html (0.8.0)
-    sprockets (2.12.3)
-      hike (~> 1.2)
-      multi_json (~> 1.0)
+    sprockets (3.1.0)
       rack (~> 1.0)
-      tilt (~> 1.1, != 1.3.0)
-    sprockets-rails (2.2.4)
+    sprockets-rails (2.3.1)
       actionpack (>= 3.0)
       activesupport (>= 3.0)
       sprockets (>= 2.8, < 4.0)
@@ -121,8 +117,7 @@ GEM
       ansi
       json
     thor (0.19.1)
-    thread_safe (0.3.4)
-    tilt (1.4.1)
+    thread_safe (0.3.5)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
     yard (0.8.7.6)