diff --git a/z_rails/Gemfile.lock b/z_rails/Gemfile.lock
index b324d6f..0e3b5c5 100644
--- a/z_rails/Gemfile.lock
+++ b/z_rails/Gemfile.lock
@@ -139,7 +139,7 @@ GEM
     treetop (1.4.10)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.33)
+    tzinfo (0.3.61)
     uglifier (1.2.6)
       execjs (>= 0.3.0)
       multi_json (~> 1.3)