diff --git a/examples/myapp/Gemfile.lock b/examples/myapp/Gemfile.lock
index 13f4fc8..8364d2c 100644
--- a/examples/myapp/Gemfile.lock
+++ b/examples/myapp/Gemfile.lock
@@ -181,7 +181,7 @@ GEM
     public_suffix (3.1.1)
     puma (4.3.1)
       nio4r (~> 2.0)
-    rack (2.0.8)
+    rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.3)