diff --git a/checkout-after/Gemfile.lock b/checkout-after/Gemfile.lock
index 3f1cf85..c4899b1 100644
--- a/checkout-after/Gemfile.lock
+++ b/checkout-after/Gemfile.lock
@@ -118,7 +118,7 @@ GEM
     treetop (1.4.10)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.33)
+    tzinfo (0.3.61)
     uglifier (1.2.5)
       execjs (>= 0.3.0)
       multi_json (~> 1.3)