diff --git a/Gemfile.lock b/Gemfile.lock
index 75a2ef3..f3b0214 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -128,7 +128,7 @@ GEM
     treetop (1.4.15)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.38)
+    tzinfo (0.3.61)
     uglifier (2.3.3)
       execjs (>= 0.3.0)
       json (>= 1.8.0)