diff --git a/startup_app/Gemfile.lock b/startup_app/Gemfile.lock
index 0296080..30a24c2 100644
--- a/startup_app/Gemfile.lock
+++ b/startup_app/Gemfile.lock
@@ -140,7 +140,7 @@ GEM
     public_suffix (4.0.3)
     puma (3.12.4)
     puma (3.12.4-java)
-    rack (2.2.3)
+    rack (2.2.6.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.4.2)