diff --git a/demo/Gemfile.lock b/demo/Gemfile.lock
index 43d243f..6bdad09 100644
--- a/demo/Gemfile.lock
+++ b/demo/Gemfile.lock
@@ -13,11 +13,11 @@ GEM
     listen (3.7.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
-    nio4r (2.5.8)
+    nio4r (2.7.3)
     parallel (1.21.0)
     parser (3.0.3.1)
       ast (~> 2.4.1)
-    puma (5.6.4)
+    puma (5.6.9)
       nio4r (~> 2.0)
     rack (2.2.3)
     rack-test (1.1.0)