diff --git a/Gemfile.lock b/Gemfile.lock
index fa36416..24d7159 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -77,7 +77,7 @@ GEM
     multi_json (1.13.1)
     nokogiri (1.10.4)
       mini_portile2 (~> 2.4.0)
-    rack (1.6.11)
+    rack (1.6.13)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.3)