diff --git a/Gemfile.lock b/Gemfile.lock
index b6243ef..85a125e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -134,7 +134,7 @@ GEM
     treetop (1.4.10)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.29)
+    tzinfo (0.3.61)
     webmock (1.7.6)
       addressable (~> 2.2, > 2.2.5)
       crack (>= 0.1.7)