diff --git a/Gemfile.lock b/Gemfile.lock
index ff51ca4..a90cfb4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -101,7 +101,7 @@ GEM
     treetop (1.4.14)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.37)
+    tzinfo (0.3.61)
     webmock (1.12.1)
       addressable (>= 2.2.7)
       crack (>= 0.3.2)