diff --git a/pubspec.yaml b/pubspec.yaml
index a93c1e4..640054a 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -5,7 +5,7 @@ homepage: https://stacked.filledstacks.com/docs/stacked-cli
 repository: https://github.com/FilledStacks/stacked/tree/master/packages/stacked_cli
 
 environment:
-  sdk: ">=2.19.0 <3.0.0"
+  sdk: "<4.0.0"
 
 dependencies:
   args: ^2.4.2