diff --git a/pubspec.yaml b/pubspec.yaml
index 9aee4d6..83d941c 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -5,7 +5,7 @@ homepage: https://github.com/Horus-Org/dart-dlc
 
 ## SDK environment
 environment:
-  sdk: '>=2.12.0 <3.0.0'
+  sdk: '<4.0.0'
 
 # Dependencies for the project
 dependencies: