diff --git a/Gemfile.lock b/Gemfile.lock
index 0bfd76a..89ba8b7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -143,7 +143,7 @@ GEM
     treetop (1.4.11)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.33)
+    tzinfo (0.3.61)
     xpath (0.1.4)
       nokogiri (~> 1.3)
     yard (0.8.3)