diff --git a/demo-5.2.1/Gemfile.lock b/demo-5.2.1/Gemfile.lock
index f377b32..9c2ad83 100644
--- a/demo-5.2.1/Gemfile.lock
+++ b/demo-5.2.1/Gemfile.lock
@@ -108,7 +108,7 @@ GEM
       mini_portile2 (~> 2.4.0)
     public_suffix (3.0.3)
     puma (3.12.1)
-    rack (2.0.6)
+    rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.1)