diff --git a/test_app/Gemfile.lock b/test_app/Gemfile.lock
index 047fd4c..6f20773 100644
--- a/test_app/Gemfile.lock
+++ b/test_app/Gemfile.lock
@@ -88,7 +88,7 @@ GEM
       mini_portile2 (~> 2.4.0)
     public_suffix (4.0.1)
     puma (3.12.4)
-    rack (2.2.2)
+    rack (2.2.6.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.1.7)