diff --git a/example/pubspec.yaml b/example/pubspec.yaml
index 892b36a..4029696 100644
--- a/example/pubspec.yaml
+++ b/example/pubspec.yaml
@@ -18,7 +18,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.12.0 <3.0.0"
+  sdk: ">=2.12.0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/pubspec.yaml b/pubspec.yaml
index 91828da..32e4e43 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -4,7 +4,7 @@ version: 1.1.4
 homepage: https://github.com/emreesen27/Flutter-Progress-Dialog.git
 
 environment:
-  sdk: '>=2.12.0 <3.0.0'
+  sdk: '>=2.12.0 <4.0.0'
   flutter: ">=1.17.0"
 
 dependencies: