diff --git a/examples/todo-vuejs/Gemfile.lock b/examples/todo-vuejs/Gemfile.lock
index 664ca1b..4a4b2e9 100644
--- a/examples/todo-vuejs/Gemfile.lock
+++ b/examples/todo-vuejs/Gemfile.lock
@@ -102,7 +102,7 @@ GEM
       byebug (~> 9.0)
       pry (~> 0.10)
     puma (3.8.2)
-    rack (2.0.1)
+    rack (2.2.3)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.1.0)