diff --git a/include/emqx_release.hrl b/include/emqx_release.hrl
index b51281a54..f4be73a77 100644
--- a/include/emqx_release.hrl
+++ b/include/emqx_release.hrl
@@ -29,7 +29,7 @@
 
 -ifndef(EMQX_ENTERPRISE).
 
--define(EMQX_RELEASE, {opensource, "4.3.20-alpha.2"}).
+-define(EMQX_RELEASE, {opensource, "4.3.21-alpha.1"}).
 
 -else.