diff --git a/README.md b/README.md
index 4ff6aea53..fe25e1839 100755
--- a/README.md
+++ b/README.md
@@ -159,6 +159,7 @@ For previous versions, please read:
 
 ## V4 changes
 
+* v4.0, 2020-09-19, RTC: Extract resource manager. Use any UDP packet to keep alive. 4.0.43
 * v4.0, 2020-09-09, RTC: Refine NACK RTT and efficiency. 4.0.42
 * v4.0, 2020-09-08, Refine PLI/NACK/DTLS logs. 4.0.41
 * v4.0, 2020-08-30, Fix serval bugs for RTC. Refine context API. 4.0.40
diff --git a/trunk/src/core/srs_core_version4.hpp b/trunk/src/core/srs_core_version4.hpp
index 8b6a729de..d175950fb 100644
--- a/trunk/src/core/srs_core_version4.hpp
+++ b/trunk/src/core/srs_core_version4.hpp
@@ -24,6 +24,6 @@
 #ifndef SRS_CORE_VERSION4_HPP
 #define SRS_CORE_VERSION4_HPP
 
-#define SRS_VERSION4_REVISION 42
+#define SRS_VERSION4_REVISION 43
 
 #endif