diff --git a/Gemfile.lock b/Gemfile.lock
index 39aa715..438dd2e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -95,7 +95,7 @@ GEM
     treetop (1.4.15)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.56)
+    tzinfo (0.3.61)
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)