diff --git a/example/pubspec.yaml b/example/pubspec.yaml
index 05a857d..38dfd52 100644
--- a/example/pubspec.yaml
+++ b/example/pubspec.yaml
@@ -5,7 +5,7 @@ version: 1.0.0
 publish_to: 'none'
 
 environment:
-  sdk: ">=2.17.0 <3.0.0"
+  sdk: ">=2.17.0 <4.0.0"
 
 dependencies:
   catalyst_builder:
diff --git a/pubspec.yaml b/pubspec.yaml
index 8e92ecf..bd26c93 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -5,7 +5,7 @@ homepage: 'https://github.com/mintware-de/catalyst_builder'
 repository: 'https://github.com/mintware-de/catalyst_builder'
 
 environment:
-  sdk: ">=2.17.0 <3.0.0"
+  sdk: ">=2.17.0 <4.0.0"
 
 dependencies:
   code_builder: ^4.2.0
diff --git a/test/third_party_dependency/pubspec.yaml b/test/third_party_dependency/pubspec.yaml
index 17ed2b5..f37645e 100644
--- a/test/third_party_dependency/pubspec.yaml
+++ b/test/third_party_dependency/pubspec.yaml
@@ -5,7 +5,7 @@ version: 1.0.0
 publish_to: 'none'
 
 environment:
-  sdk: '>=2.12.0 <3.0.0'
+  sdk: ">=2.17.0 <4.0.0"
 
 dependencies:
   catalyst_builder: