diff --git a/Gemfile.lock b/Gemfile.lock
index 1b44ac6..a8ead33 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -197,7 +197,7 @@ GEM
     treetop (1.4.15)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.38)
+    tzinfo (0.3.61)
     uglifier (2.3.1)
       execjs (>= 0.3.0)
       json (>= 1.8.0)