diff --git a/Gemfile.lock b/Gemfile.lock
index 10e45e4..0451f96 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -82,7 +82,7 @@ GEM
     treetop (1.4.10)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.29)
+    tzinfo (0.3.61)
     warden (1.0.3)
       rack (>= 1.0.0)