diff --git a/README.md b/README.md
index bc58fb037..71e3df02e 100755
--- a/README.md
+++ b/README.md
@@ -180,6 +180,7 @@ For external services to work with SRS:
 
 ## V4 changes
 
+* v4.0, 2021-05-28, Fix bugs for GB28181 and RTC. 4.0.123
 * v4.0, 2021-05-21, Fix [#2370][bug #2370] bug for Firefox play stream(published by Chrome). 4.0.121
 * v4.0, 2021-05-21, RTC: Refine sdk, migrate from onaddstream to ontrack. 4.0.120
 * v4.0, 2021-05-21, Tools: Refine configure options. 4.0.119
diff --git a/trunk/src/core/srs_core_version4.hpp b/trunk/src/core/srs_core_version4.hpp
index 8535e8636..71d52926d 100644
--- a/trunk/src/core/srs_core_version4.hpp
+++ b/trunk/src/core/srs_core_version4.hpp
@@ -26,6 +26,6 @@
 
 #define VERSION_MAJOR       4
 #define VERSION_MINOR       0
-#define VERSION_REVISION    122
+#define VERSION_REVISION    123
 
 #endif