diff --git a/Gemfile.lock b/Gemfile.lock
index a1ffe78..bf337fe 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -171,7 +171,7 @@ GEM
     treetop (1.4.15)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.38)
+    tzinfo (0.3.39)
     uglifier (2.4.0)
       execjs (>= 0.3.0)
       json (>= 1.8.0)