diff --git a/Gemfile.lock b/Gemfile.lock
index 438fd71..87c4cee 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -76,7 +76,7 @@ GEM
     multi_json (1.13.1)
     nokogiri (1.10.5)
       mini_portile2 (~> 2.4.0)
-    rack (1.6.10)
+    rack (1.6.13)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.8)