diff --git a/Gemfile.lock b/Gemfile.lock
index 03314fa408..25b35178e7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -109,7 +109,7 @@ GEM
       html-pipeline (~> 2.0)
       nokogiri (~> 1.6.4)
     parallel (1.6.2)
-    rack (1.6.4)
+    rack (1.6.13)
     rack-protection (1.5.3)
       rack
     rack-ssl-enforcer (0.2.9)