diff --git a/Gemfile.lock b/Gemfile.lock
index 2238e48..0278b05 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -104,7 +104,7 @@ GEM
     thor (0.19.4)
     thread_safe (0.3.6)
     tilt (2.0.8)
-    tzinfo (1.2.3)
+    tzinfo (1.2.11)
       thread_safe (~> 0.1)
     uglifier (3.2.0)
       execjs (>= 0.3.0, < 3)