diff --git a/example/pubspec.yaml b/example/pubspec.yaml
index a077bb1..ed72635 100644
--- a/example/pubspec.yaml
+++ b/example/pubspec.yaml
@@ -5,7 +5,7 @@ publish_to: "none"
 version: 0.0.1
 
 environment:
-  sdk: ">=2.15.0 <3.0.0"
+  sdk: ">=2.15.0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/pubspec.yaml b/pubspec.yaml
index c07c58b..c1db8ae 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -5,7 +5,7 @@ issue_tracker: https://github.com/ricardodalarme/flutter_card_swiper/issues
 version: 5.1.0
 
 environment:
-  sdk: ">=2.12.0 <3.0.0"
+  sdk: ">=2.12.0 <4.0.0"
   flutter: ">=1.17.0"
 
 dependencies: