diff --git a/example/pubspec.lock b/example/pubspec.lock
index 4a08fe8..76a86a6 100644
--- a/example/pubspec.lock
+++ b/example/pubspec.lock
@@ -87,7 +87,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "0.2.9"
+    version: "0.3.0-dev.0"
   source_span:
     dependency: transitive
     description:
diff --git a/pubspec.yaml b/pubspec.yaml
index 1ba955e..bff9cc8 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: rxdart_ext
 description: Some extension methods and classes built on top of RxDart - RxDart extension.
-version: 0.2.9
+version: 0.3.0-dev.0
 homepage: https://github.com/hoc081098/rxdart_ext.git
 repository: https://github.com/hoc081098/rxdart_ext.git
 issue_tracker: https://github.com/hoc081098/rxdart_ext/issues