diff --git a/flutter_cache_manager_firebase/pubspec.yaml b/flutter_cache_manager_firebase/pubspec.yaml
index 95e819cb..4ffd2c0c 100644
--- a/flutter_cache_manager_firebase/pubspec.yaml
+++ b/flutter_cache_manager_firebase/pubspec.yaml
@@ -4,7 +4,7 @@ version: 2.0.2
 homepage: https://github.com/Baseflow/flutter_cache_manager
 
 environment:
-  sdk: ">=2.12.0 <3.0.0"
+  sdk: ">=2.12.0 <4.0.0"
 
 dependencies:
   flutter: