diff --git a/package.json b/package.json
index a32a80e409..d36dd16cef 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "openlayers",
-  "version": "3.20.1",
+  "version": "3.21.0-beta.1",
   "description": "Build tools and sources for developing OpenLayers based mapping applications",
   "keywords": [
     "map",