bump version number
diff --git a/tutorial/dart/console_client/pubspec.yaml b/tutorial/dart/console_client/pubspec.yaml
index e5c0938..bf61ded 100644
--- a/tutorial/dart/console_client/pubspec.yaml
+++ b/tutorial/dart/console_client/pubspec.yaml
@@ -16,7 +16,7 @@
 # under the License.
 
 name: tutorial_console_client
-version: 0.20.0
+version: 0.21.0
 description: >
   A Dart console client to implementation of the Apache Thrift tutorial
 author: Apache Thrift Developers <dev@thrift.apache.org>