diff --git a/Gemfile.lock b/Gemfile.lock
index 1a91e36..3c40dc9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -114,7 +114,7 @@ GEM
     psych (3.3.2)
     public_suffix (4.0.4)
     racc (1.6.0)
-    rack (2.2.3)
+    rack (2.2.6.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails-dom-testing (2.0.3)