diff --git a/imperative/python/megengine/version.py b/imperative/python/megengine/version.py
index e4ce488f..28ff08c5 100644
--- a/imperative/python/megengine/version.py
+++ b/imperative/python/megengine/version.py
@@ -6,5 +6,5 @@
 # Unless required by applicable law or agreed to in writing,
 # software distributed under the License is distributed on an
 # "AS IS" BASIS, WITHOUT ARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-__version__ = "0.8.0"
+__version__ = "1.2.0.dev"