diff --git a/README.md b/README.md
index 2d0db60aa..90cb3fd92 100755
--- a/README.md
+++ b/README.md
@@ -181,6 +181,7 @@ For external services to work with SRS:
 
 ## V5 changes
 
+* v4.0, 2021-05-31, Use [SPDX-License-Identifier: MIT](https://spdx.dev/ids/). 5.0.3
 * v5.0, 2021-05-19, ST: Simplify it, only Linux/Darwin, epoll/kqueue, single process. 5.0.2
 * v5.0, 2021-03-17, Live: Refine edge to follow client and HTTP/302. 5.0.1
 * v5.0, 2021-03-15, Init SRS/5. 5.0.0
diff --git a/trunk/src/core/srs_core_version5.hpp b/trunk/src/core/srs_core_version5.hpp
index a31d97a55..addf11579 100644
--- a/trunk/src/core/srs_core_version5.hpp
+++ b/trunk/src/core/srs_core_version5.hpp
@@ -9,6 +9,6 @@
 
 #define VERSION_MAJOR       5
 #define VERSION_MINOR       0
-#define VERSION_REVISION    2
+#define VERSION_REVISION    3
 
 #endif