diff --git a/src/tchiba/Gemfile.lock b/src/tchiba/Gemfile.lock
index e9e2142..f9f3bdc 100644
--- a/src/tchiba/Gemfile.lock
+++ b/src/tchiba/Gemfile.lock
@@ -239,7 +239,7 @@ GEM
     turbolinks (5.2.1)
       turbolinks-source (~> 5.2)
     turbolinks-source (5.2.0)
-    tzinfo (1.2.7)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     warden (1.2.8)
       rack (>= 2.0.6)