diff --git a/Gemfile.lock b/Gemfile.lock
index ecfa27c..f4d2b95 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -91,7 +91,7 @@ GEM
     treetop (1.4.15)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.46)
+    tzinfo (0.3.61)
     uglifier (2.7.2)
       execjs (>= 0.3.0)
       json (>= 1.8.0)