diff --git a/pubspec.yaml b/pubspec.yaml
index 916da0f1..e5714154 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -4,7 +4,7 @@ version: 3.4.1
 homepage: https://github.com/FilledStacks/stacked
 
 environment:
-  sdk: '>=2.17.0 <3.0.0'
+  sdk: '<4.0.0'
 
 dependencies:
   flutter: