diff --git a/Gemfile.lock b/Gemfile.lock
index c3bda8f00..5ab5f4b89 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -29,36 +29,36 @@ GEM
   remote: https://rubygems.org/
   remote: https://rails-assets.org/
   specs:
-    actionmailer (5.1.1)
-      actionpack (= 5.1.1)
-      actionview (= 5.1.1)
-      activejob (= 5.1.1)
+    actionmailer (4.2.6)
+      actionpack (= 4.2.6)
+      actionview (= 4.2.6)
+      activejob (= 4.2.6)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 1.0, >= 1.0.5)
-    actionpack (5.1.1)
-      actionview (= 5.1.1)
-      activesupport (= 5.1.1)
+    actionpack (4.2.6)
+      actionview (= 4.2.6)
+      activesupport (= 4.2.6)
       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 (5.1.1)
-      activesupport (= 5.1.1)
+    actionview (4.2.6)
+      activesupport (= 4.2.6)
       builder (~> 3.1)
       erubis (~> 2.7.0)
       rails-dom-testing (~> 1.0, >= 1.0.5)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    activejob (5.1.1)
-      activesupport (= 5.1.1)
+    activejob (4.2.6)
+      activesupport (= 4.2.6)
       globalid (>= 0.3.0)
-    activemodel (5.1.1)
-      activesupport (= 5.1.1)
+    activemodel (4.2.6)
+      activesupport (= 4.2.6)
       builder (~> 3.1)
-    activerecord (5.1.1)
-      activemodel (= 5.1.1)
-      activesupport (= 5.1.1)
+    activerecord (4.2.6)
+      activemodel (= 4.2.6)
+      activesupport (= 4.2.6)
       arel (~> 6.0)
-    activesupport (5.1.1)
+    activesupport (4.2.6)
       i18n (~> 0.7)
       json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
@@ -305,16 +305,16 @@ GEM
       rack (>= 1.0.0)
     rack-utf8_sanitizer (1.3.2)
       rack (>= 1.0, < 3.0)
-    rails (5.1.1)
-      actionmailer (= 5.1.1)
-      actionpack (= 5.1.1)
-      actionview (= 5.1.1)
-      activejob (= 5.1.1)
-      activemodel (= 5.1.1)
-      activerecord (= 5.1.1)
-      activesupport (= 5.1.1)
+    rails (4.2.6)
+      actionmailer (= 4.2.6)
+      actionpack (= 4.2.6)
+      actionview (= 4.2.6)
+      activejob (= 4.2.6)
+      activemodel (= 4.2.6)
+      activerecord (= 4.2.6)
+      activesupport (= 4.2.6)
       bundler (>= 1.3.0, < 2.0)
-      railties (= 5.1.1)
+      railties (= 4.2.6)
       sprockets-rails
     rails-assets-notifyjs (0.4.2)
     rails-deprecated_sanitizer (1.0.3)
@@ -327,9 +327,9 @@ GEM
       loofah (~> 2.0)
     rails3-generators (1.0.0)
       railties (>= 3.0.0)
-    railties (5.1.1)
-      actionpack (= 5.1.1)
-      activesupport (= 5.1.1)
+    railties (4.2.6)
+      actionpack (= 4.2.6)
+      activesupport (= 4.2.6)
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     rake (11.1.2)