diff --git a/Gemfile.lock b/Gemfile.lock
index d7a69b5..37a1df9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -109,7 +109,7 @@ GEM
       polyglot (>= 0.3.1)
     turn (0.8.2)
       ansi (>= 1.2.2)
-    tzinfo (0.3.27)
+    tzinfo (0.3.28)
     uglifier (0.5.4)
       execjs (>= 0.3.0)
       multi_json (>= 1.0.2)