diff --git a/pubspec.yaml b/pubspec.yaml
index b9f93a4..fd6ea77 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -5,7 +5,7 @@ documentation: https://github.com/ziqq/flutter_in_store_app_version_checker
 version: 1.5.3
 
 environment:
-  sdk: ">=2.12.0 <3.0.0"
+  sdk: '>=2.12.0 <4.0.0'
   flutter: ">=3.0.0"
 
 dependencies: