diff --git a/Gemfile.lock b/Gemfile.lock
index 46207e9..9251822 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -153,7 +153,7 @@ 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)