diff --git a/tensorbay/__version__.py b/tensorbay/__version__.py
index 6fc8f454d..2dab53cef 100644
--- a/tensorbay/__version__.py
+++ b/tensorbay/__version__.py
@@ -5,4 +5,4 @@
 
 """Graviti python SDK version info."""
 
-__version__ = "1.20.0.dev"
+__version__ = "1.21.0.dev"