diff --git a/tensornetwork/version.py b/tensornetwork/version.py
index 6acb3fdb5..9d39366a8 100644
--- a/tensornetwork/version.py
+++ b/tensornetwork/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = '0.3.1'
+__version__ = '0.4.0'