diff --git a/Gemfile.lock b/Gemfile.lock
index 6f25a05..c7c3107 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -148,7 +148,7 @@ GEM
       method_source (~> 0.8.1)
       slop (~> 3.4)
     puma (3.4.0)
-    rack (1.6.4)
+    rack (1.6.12)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.4)
@@ -227,7 +227,6 @@ GEM
       websocket (~> 1.0)
     sendgrid (1.2.4)
       json
-      json
     shoulda-matchers (3.1.1)
       activesupport (>= 4.0.0)
     slop (3.6.0)