diff --git a/pubspec.yaml b/pubspec.yaml
index a02e3b8..8b7c842 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -4,7 +4,7 @@ version: 1.0.0
 homepage: https://github.com/aarajput/flutter_form_validators
 
 environment:
-  sdk: ">=2.12.0 <3.0.0"
+  sdk: ">=3.1.3 <3.0.0"
 
 dependencies:
   flutter: