diff --git a/examples/rails-custom-login-page/Gemfile.lock b/examples/rails-custom-login-page/Gemfile.lock
index de25f0e..83502c3 100644
--- a/examples/rails-custom-login-page/Gemfile.lock
+++ b/examples/rails-custom-login-page/Gemfile.lock
@@ -101,7 +101,7 @@ GEM
       nokogiri (>= 1.6.3.1)
     public_suffix (3.0.2)
     puma (3.12.2)
-    rack (2.0.8)
+    rack (2.2.3)
     rack-test (0.8.3)
       rack (>= 1.0, < 3)
     rails (5.1.5)