diff --git a/Gemfile.lock b/Gemfile.lock
index 47894c2..3799172 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -131,7 +131,7 @@ GEM
       polyglot (>= 0.3.1)
     turn (0.9.5)
       ansi
-    tzinfo (0.3.37)
+    tzinfo (0.3.61)
     xpath (0.1.4)
       nokogiri (~> 1.3)