diff --git a/Gemfile.lock b/Gemfile.lock
index b045e39..c3f6d99 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -27,7 +27,7 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.1)
       tzinfo (~> 1.1)
-    angularjs-rails (1.3.3)
+    angularjs-rails (1.3.4)
     arel (5.0.1.20140414130214)
     bson (2.3.0)
     builder (3.2.2)
@@ -49,7 +49,7 @@ GEM
     celluloid (0.16.0)
       timers (~> 4.0.0)
     chunky_png (1.3.3)
-    codeclimate-test-reporter (0.4.1)
+    codeclimate-test-reporter (0.4.3)
       simplecov (>= 0.7.1, < 1.0.0)
     coderay (1.1.0)
     coffee-rails (4.1.0)
@@ -82,7 +82,7 @@ GEM
     foundation-rails (5.4.5.0)
       railties (>= 3.1.0)
       sass (>= 3.2.0)
-    guard (2.8.2)
+    guard (2.10.1)
       formatador (>= 0.2.4)
       listen (~> 2.7)
       lumberjack (~> 1.0)
@@ -93,9 +93,9 @@ GEM
       guard (~> 2.2)
     guard-rails (0.7.0)
       guard (~> 2.0)
-    guard-rspec (4.3.1)
+    guard-rspec (4.4.1)
       guard (~> 2.1)
-      rspec (>= 2.14, < 4.0)
+      rspec (>= 2.99.0, < 4.0)
     hike (1.2.3)
     hitimes (1.2.2)
     html_truncator (0.4.0)
@@ -106,7 +106,7 @@ GEM
       thor (>= 0.14, < 2.0)
     json (1.8.1)
     kgio (2.9.2)
-    listen (2.8.1)
+    listen (2.8.3)
       celluloid (>= 0.15.2)
       rb-fsevent (>= 0.9.3)
       rb-inotify (>= 0.9)
@@ -138,9 +138,9 @@ GEM
       connection_pool (~> 2.0)
       optionable (~> 0.2.0)
     multi_json (1.10.1)
-    netrc (0.8.0)
-    newrelic_rpm (3.9.7.266)
-    nokogiri (1.6.4.1)
+    netrc (0.9.0)
+    newrelic_rpm (3.9.8.273)
+    nokogiri (1.6.5)
       mini_portile (~> 0.6.0)
     optionable (0.2.0)
     origin (2.1.1)
@@ -173,11 +173,11 @@ GEM
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     raindrops (0.13.0)
-    rake (10.3.2)
+    rake (10.4.2)
     rb-fsevent (0.9.4)
     rb-inotify (0.9.5)
       ffi (>= 0.5.0)
-    redcarpet (3.2.0)
+    redcarpet (3.2.1)
     redis (3.1.0)
     redis-namespace (1.5.1)
       redis (~> 3.0, >= 3.0.4)
@@ -211,10 +211,10 @@ GEM
       sidekiq (>= 2.4.0)
     rspec-support (3.1.2)
     sass (3.2.19)
-    sass-rails (4.0.4)
+    sass-rails (4.0.5)
       railties (>= 4.0.0, < 5.0)
       sass (~> 3.2.2)
-      sprockets (~> 2.8, < 2.12)
+      sprockets (~> 2.8, < 3.0)
       sprockets-rails (~> 2.0)
     sidekiq (3.3.0)
       celluloid (>= 0.16.0)
@@ -222,7 +222,7 @@ GEM
       json
       redis (>= 3.0.6)
       redis-namespace (>= 1.3.1)
-    simple_form (3.0.2)
+    simple_form (3.1.0)
       actionpack (~> 4.0)
       activemodel (~> 4.0)
     simplecov (0.9.1)
@@ -240,12 +240,12 @@ GEM
       slim (~> 2.0)
     slop (3.6.0)
     spring (1.2.0)
-    sprockets (2.11.3)
+    sprockets (2.12.3)
       hike (~> 1.2)
       multi_json (~> 1.0)
       rack (~> 1.0)
       tilt (~> 1.1, != 1.3.0)
-    sprockets-rails (2.2.1)
+    sprockets-rails (2.2.2)
       actionpack (>= 3.0)
       activesupport (>= 3.0)
       sprockets (>= 2.8, < 4.0)
diff --git a/app/controllers/admin/posts_controller.rb b/app/controllers/admin/posts_controller.rb
index 9bf73ce..bcc449c 100644
--- a/app/controllers/admin/posts_controller.rb
+++ b/app/controllers/admin/posts_controller.rb
@@ -65,7 +65,7 @@ class Admin::PostsController < ApplicationController
   end
 
   def preview
-    render :text => Post.render_html(params[:content] || "")
+    render plain: Post.render_html(params[:content] || "")
   end
 
   private