diff --git a/superset/assets/package.json b/superset/assets/package.json
index 6f6068d6e5247..43aa268f288f4 100644
--- a/superset/assets/package.json
+++ b/superset/assets/package.json
@@ -1,6 +1,6 @@
 {
   "name": "superset",
-  "version": "0.20.1",
+  "version": "0.21.0dev",
   "description": "Superset is a data exploration platform designed to be visual, intuitive, and interactive.",
   "license": "Apache-2.0",
   "directories": {