diff --git a/app/Gemfile.lock b/app/Gemfile.lock
index 01da8b2..69b6c32 100644
--- a/app/Gemfile.lock
+++ b/app/Gemfile.lock
@@ -271,7 +271,7 @@ GEM
       method_source (~> 0.8.1)
       slop (~> 3.4)
     puma (3.9.1)
-    rack (2.0.3)
+    rack (2.2.3)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.1.2)
@@ -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)