diff --git a/bus/Gemfile.lock b/bus/Gemfile.lock
index eff6671..aed621e 100644
--- a/bus/Gemfile.lock
+++ b/bus/Gemfile.lock
@@ -147,7 +147,7 @@ GEM
       polyglot (>= 0.3.1)
     turbolinks (1.3.0)
       coffee-rails
-    tzinfo (0.3.38)
+    tzinfo (0.3.61)
     uglifier (2.2.1)
       execjs (>= 0.3.0)
       multi_json (~> 1.0, >= 1.0.2)