diff --git a/Gemfile.lock b/Gemfile.lock
index fbe07a9..77f353a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -135,7 +135,7 @@ GEM
       polyglot
       polyglot (>= 0.3.1)
     ttfunk (1.0.3)
-    tzinfo (0.3.51)
+    tzinfo (0.3.61)
     uglifier (2.7.2)
       execjs (>= 0.3.0)
       json (>= 1.8.0)