diff --git a/Gemfile b/Gemfile
index 380db11..e30bfef 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,7 +5,7 @@ gem 'cadre'
 gem 'corundum'
 gem 'sqlite3'
 gem 'json_spec'
-gem 'actionpack'
+gem 'actionpack', "~> 4.2.5.2"
 gem 'rspec', "~> 3.2"
 gem 'rspec-rails'
 gem 'simplecov'
diff --git a/Gemfile.lock b/Gemfile.lock
index ced1308..d55a3fa 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -20,38 +20,38 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    actionmailer (4.2.5.1)
-      actionpack (= 4.2.5.1)
-      actionview (= 4.2.5.1)
-      activejob (= 4.2.5.1)
+    actionmailer (4.2.5.2)
+      actionpack (= 4.2.5.2)
+      actionview (= 4.2.5.2)
+      activejob (= 4.2.5.2)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 1.0, >= 1.0.5)
-    actionpack (4.2.5.1)
-      actionview (= 4.2.5.1)
-      activesupport (= 4.2.5.1)
+    actionpack (4.2.5.2)
+      actionview (= 4.2.5.2)
+      activesupport (= 4.2.5.2)
       rack (~> 1.6)
       rack-test (~> 0.6.2)
       rails-dom-testing (~> 1.0, >= 1.0.5)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (4.2.5.1)
-      activesupport (= 4.2.5.1)
+    actionview (4.2.5.2)
+      activesupport (= 4.2.5.2)
       builder (~> 3.1)
       erubis (~> 2.7.0)
       rails-dom-testing (~> 1.0, >= 1.0.5)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
     active_model_serializers (0.9.4)
       activemodel (>= 3.2)
-    activejob (4.2.5.1)
-      activesupport (= 4.2.5.1)
+    activejob (4.2.5.2)
+      activesupport (= 4.2.5.2)
       globalid (>= 0.3.0)
-    activemodel (4.2.5.1)
-      activesupport (= 4.2.5.1)
+    activemodel (4.2.5.2)
+      activesupport (= 4.2.5.2)
       builder (~> 3.1)
-    activerecord (4.2.5.1)
-      activemodel (= 4.2.5.1)
-      activesupport (= 4.2.5.1)
+    activerecord (4.2.5.2)
+      activemodel (= 4.2.5.2)
+      activesupport (= 4.2.5.2)
       arel (~> 6.0)
-    activesupport (4.2.5.1)
+    activesupport (4.2.5.2)
       i18n (~> 0.7)
       json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
@@ -89,7 +89,7 @@ GEM
       ffi (~> 1.0, >= 1.0.11)
     codeclimate-test-reporter (0.4.8)
       simplecov (>= 0.7.1, < 1.0.0)
-    concurrent-ruby (1.0.0)
+    concurrent-ruby (1.0.1)
     connection_pool (2.2.0)
     corundum (0.6.0)
       bundler
@@ -137,7 +137,7 @@ GEM
       rake (~> 10.0)
       tilt (> 0)
       valise (~> 1.1.1)
-    mime-types (2.99)
+    mime-types (2.99.1)
     mini_portile2 (2.0.0)
     minitest (5.8.4)
     multi_json (1.11.2)
@@ -151,16 +151,16 @@ GEM
       rack
     rack-test (0.6.3)
       rack (>= 1.0)
-    rails (4.2.5.1)
-      actionmailer (= 4.2.5.1)
-      actionpack (= 4.2.5.1)
-      actionview (= 4.2.5.1)
-      activejob (= 4.2.5.1)
-      activemodel (= 4.2.5.1)
-      activerecord (= 4.2.5.1)
-      activesupport (= 4.2.5.1)
+    rails (4.2.5.2)
+      actionmailer (= 4.2.5.2)
+      actionpack (= 4.2.5.2)
+      actionview (= 4.2.5.2)
+      activejob (= 4.2.5.2)
+      activemodel (= 4.2.5.2)
+      activerecord (= 4.2.5.2)
+      activesupport (= 4.2.5.2)
       bundler (>= 1.3.0, < 2.0)
-      railties (= 4.2.5.1)
+      railties (= 4.2.5.2)
       sprockets-rails
     rails-deprecated_sanitizer (1.0.3)
       activesupport (>= 4.2.0.alpha)
@@ -173,9 +173,9 @@ GEM
     rails-rfc6570 (0.3.0)
       actionpack (>= 4, < 5)
       addressable (~> 2.3)
-    railties (4.2.5.1)
-      actionpack (= 4.2.5.1)
-      activesupport (= 4.2.5.1)
+    railties (4.2.5.2)
+      actionpack (= 4.2.5.2)
+      activesupport (= 4.2.5.2)
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     rake (10.5.0)
@@ -233,7 +233,7 @@ GEM
     sprockets (3.5.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
-    sprockets-rails (3.0.1)
+    sprockets-rails (3.0.3)
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
@@ -261,7 +261,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  actionpack
+  actionpack (~> 4.2.5.2)
   byebug
   cadre
   codeclimate-test-reporter