diff --git a/VERSION.dat b/VERSION.dat
index 7b545caf9..3dbc77ac7 100644
--- a/VERSION.dat
+++ b/VERSION.dat
@@ -8,4 +8,4 @@ SHLIB_VERSION=3
 TONGSUO_MAJOR=8
 TONGSUO_MINOR=4
 TONGSUO_PATCH=0
-TONGSUO_PRE_RELEASE_TAG=dev
+TONGSUO_PRE_RELEASE_TAG=pre1