diff --git a/Gemfile.lock b/Gemfile.lock
index 726a77de..a575c4cd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -267,7 +267,7 @@ GEM
     pusher-signature (0.1.8)
     pygments.rb (2.2.0)
     racc (1.5.2)
-    rack (2.2.3)
+    rack (2.2.6.3)
     rack-cors (1.1.1)
       rack (>= 2.0.0)
     rack-protection (2.2.2)