diff --git a/Gemfile.lock b/Gemfile.lock
index 0c0dc63..ec15dc8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -133,7 +133,7 @@ GEM
     treetop (1.4.10)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.33)
+    tzinfo (0.3.61)
     xpath (0.1.4)
       nokogiri (~> 1.3)