diff --git a/examples/Gemfile.lock b/examples/Gemfile.lock
index 99fc0e2..c5331f0 100644
--- a/examples/Gemfile.lock
+++ b/examples/Gemfile.lock
@@ -94,7 +94,7 @@ GEM
     nio4r (2.5.2)
     nokogiri (1.10.5)
       mini_portile2 (~> 2.4.0)
-    rack (2.0.7)
+    rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (6.0.1)