diff --git a/dummy_app/Gemfile.lock b/dummy_app/Gemfile.lock
index 4069a2f1..97f8e47c 100644
--- a/dummy_app/Gemfile.lock
+++ b/dummy_app/Gemfile.lock
@@ -2,7 +2,9 @@ GEM
   remote: https://rubygems.org/
   specs:
     mustermann (1.0.0)
-    puma (3.9.1)
+    nio4r (2.7.0)
+    puma (5.6.8)
+      nio4r (~> 2.0)
     rack (2.0.3)
     rack-protection (2.0.0)
       rack