diff --git a/Gemfile.lock b/Gemfile.lock
index 61100af..589caf9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -93,7 +93,7 @@ GEM
     treetop (1.4.15)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.39)
+    tzinfo (0.3.61)
     uglifier (1.2.3)
       execjs (>= 0.3.0)
       multi_json (>= 1.0.2)