diff --git a/Gemfile.lock b/Gemfile.lock
index baa91a7..f1852cb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -102,7 +102,7 @@ GEM
     treetop (1.4.15)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.57)
+    tzinfo (0.3.61)
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)