diff --git a/Gemfile.lock b/Gemfile.lock
index 1c6cc29..45c1b27 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -303,7 +303,7 @@ GEM
     treetop (1.4.15)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.53)
+    tzinfo (0.3.61)
     uber (0.1.0)
     uglifier (2.5.3)
       execjs (>= 0.3.0)