diff --git a/Gemfile.lock b/Gemfile.lock
index de90b4a..79ec233 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -111,7 +111,7 @@ GEM
     multi_json (1.3.5)
     nokogiri (1.5.5)
     polyglot (0.3.3)
-    rack (1.4.1)
+    rack (1.4.7)
     rack-cache (1.2)
       rack (>= 0.4)
     rack-ssl (1.3.2)
@@ -169,7 +169,6 @@ GEM
       rubyzip
     sendgrid (1.0.1)
       json
-      json
     sprockets (2.1.3)
       hike (~> 1.2)
       rack (~> 1.0)