diff --git a/Gemfile.lock b/Gemfile.lock
index 7f15f01..9e3889e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -118,7 +118,7 @@ GEM
     treetop (1.4.10)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.31)
+    tzinfo (0.3.61)
     uglifier (1.2.2)
       execjs (>= 0.3.0)
       multi_json (>= 1.0.2)