diff --git a/hello_app/Gemfile.lock b/hello_app/Gemfile.lock
index 5357939..1a060dd 100644
--- a/hello_app/Gemfile.lock
+++ b/hello_app/Gemfile.lock
@@ -89,7 +89,7 @@ GEM
     pg (0.20.0)
     public_suffix (4.0.1)
     puma (3.12.2)
-    rack (2.0.7)
+    rack (2.0.8)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.1.7)