diff --git a/example/pubspec.yaml b/example/pubspec.yaml
index 2297b2e..9e2c2dd 100644
--- a/example/pubspec.yaml
+++ b/example/pubspec.yaml
@@ -2,7 +2,7 @@ name: black_hole_flutter_example
 publish_to: none
 
 environment:
-  sdk: '>=2.19.0 <3.0.0'
+  sdk: '>=2.19.0 <4.0.0'
   flutter: '>=3.7.0'
 
 dependencies:
diff --git a/pubspec.yaml b/pubspec.yaml
index 719180f..0fa849f 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -7,7 +7,7 @@ screenshots:
     path: doc/widgets-buttons.gif
 
 environment:
-  sdk: '>=2.19.0 <3.0.0'
+  sdk: '>=2.19.0 <4.0.0'
   flutter: '>=3.7.0'
 
 dependencies: