diff --git a/Gemfile.lock b/Gemfile.lock
index e8c6bac..d915c34 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -168,7 +168,7 @@ GEM
     treetop (1.4.10)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.33)
+    tzinfo (0.3.61)
     uglifier (1.2.3)
       execjs (>= 0.3.0)
       multi_json (>= 1.0.2)