diff --git a/frontend-sinatra/Gemfile.lock b/frontend-sinatra/Gemfile.lock
index 9b6ee0e..9d032b2 100644
--- a/frontend-sinatra/Gemfile.lock
+++ b/frontend-sinatra/Gemfile.lock
@@ -6,7 +6,7 @@ GEM
     nio4r (2.5.2)
     puma (4.3.5)
       nio4r (~> 2.0)
-    rack (2.2.3)
+    rack (2.2.3.1)
     rack-protection (2.0.8.1)
       rack
     rack-test (1.1.0)