diff --git a/pubspec.yaml b/pubspec.yaml
index 0282649..9708eb1 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,9 @@
 name: login_demo
 description: Flutter and Firebase authentication demo
 
+environment:
+  sdk: '>=2.10.0 <3.0.0'
+  
 dependencies:
   flutter:
     sdk: flutter