diff --git a/rails/tweet_app/Gemfile.lock b/rails/tweet_app/Gemfile.lock
index ea5b762..28614ff 100644
--- a/rails/tweet_app/Gemfile.lock
+++ b/rails/tweet_app/Gemfile.lock
@@ -138,7 +138,7 @@ GEM
     turbolinks (5.0.1)
       turbolinks-source (~> 5)
     turbolinks-source (5.1.0)
-    tzinfo (1.2.5)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     uglifier (3.0.4)
       execjs (>= 0.3.0, < 3)