diff --git a/mailit/Gemfile.lock b/mailit/Gemfile.lock
index 6a32aa6..948eb1c 100644
--- a/mailit/Gemfile.lock
+++ b/mailit/Gemfile.lock
@@ -109,7 +109,7 @@ GEM
       polyglot (>= 0.3.1)
     turn (0.8.3)
       ansi
-    tzinfo (0.3.31)
+    tzinfo (0.3.61)
     uglifier (1.2.1)
       execjs (>= 0.3.0)
       multi_json (>= 1.0.2)