diff --git a/Gemfile.lock b/Gemfile.lock
index e89086a..1fd2914 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -70,7 +70,7 @@ GEM
     netrc (0.11.0)
     nokogiri (1.8.2)
       mini_portile2 (~> 2.3.0)
-    rack (1.6.9)
+    rack (1.6.13)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.7.1)