diff --git a/pubspec.yaml b/pubspec.yaml
index be27f0f..90b04b8 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -4,7 +4,7 @@ version: 2.0.0
 repository: https://github.com/Firelands128/photo_gallery
 
 environment:
-  sdk: ">=2.12.0 <3.0.0"
+  sdk: ">=2.12.0 <4.0.0"
   flutter: ">=1.10.0"
 
 dependencies: