diff --git a/app/Gemfile.lock b/app/Gemfile.lock
index 01da8b2..d4f83f1 100644
--- a/app/Gemfile.lock
+++ b/app/Gemfile.lock
@@ -358,7 +358,7 @@ GEM
       railties (>= 5.0)
     websocket-driver (0.6.5)
       websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.2)
+    websocket-extensions (0.1.5)
     will_paginate (3.1.5)
     xml-simple (1.1.5)
 
@@ -391,7 +391,6 @@ DEPENDENCIES
   spring-watcher-listen (= 2.0.1)
   therubyracer
   turbolinks (= 5.0.1)
-  tzinfo-data
   uglifier (= 3.2.0)
   web-console (= 3.5.1)
   will_paginate (= 3.1.5)