diff --git a/adaptive_app/step_06/yt_cors_proxy/pubspec.yaml b/adaptive_app/step_06/yt_cors_proxy/pubspec.yaml
index 054afc31c5..f8f7aaf843 100644
--- a/adaptive_app/step_06/yt_cors_proxy/pubspec.yaml
+++ b/adaptive_app/step_06/yt_cors_proxy/pubspec.yaml
@@ -11,4 +11,4 @@ dependencies:
   shelf_cors_headers: ^0.1.5
 
 dev_dependencies:
-  lints: ^2.0.0
+  lints: ">=2.0.0 <4.0.0"