diff --git a/README.md b/README.md
index c2ed51dc6..b941b43c1 100755
--- a/README.md
+++ b/README.md
@@ -176,6 +176,7 @@ The ports used by SRS:
 
 ## V4 changes
 
+* v4.0, 2021-05-06, RTC: Fix config bug for nack and twcc. 4.0.99
 * v4.0, 2021-05-04, Add video room demo. 4.0.98
 * v4.0, 2021-05-03, Add RTC stream merging demo by FFmpeg. 4.0.97
 * v4.0, 2021-05-02, Add one to one demo. 4.0.96
diff --git a/trunk/src/core/srs_core_version4.hpp b/trunk/src/core/srs_core_version4.hpp
index 30cccb4d5..3c6df669c 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    98
+#define VERSION_REVISION    99
 
 #endif