diff --git a/Gemfile.lock b/Gemfile.lock
index 3d900d8..99e42e7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -298,7 +298,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     puma (3.12.2)
-    rack (2.0.7)
+    rack (2.0.8)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.1.6)
@@ -382,6 +382,8 @@ GEM
     turbolinks-source (5.1.0)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
+    tzinfo-data (1.2019.3)
+      tzinfo (>= 1.0.0)
     uglifier (3.2.0)
       execjs (>= 0.3.0, < 3)
     unf (0.1.4)
@@ -427,7 +429,7 @@ DEPENDENCIES
   spring-watcher-listen (= 2.0.1)
   sqlite3 (= 1.3.13)
   turbolinks (= 5.0.1)
-  tzinfo-data
+  tzinfo-data (= 1.2019.3)
   uglifier (= 3.2.0)
   web-console (= 3.5.1)
   will_paginate (= 3.1.6)