diff --git a/README.md b/README.md
index ec2e148e3..6a14bb508 100755
--- a/README.md
+++ b/README.md
@@ -153,6 +153,7 @@ For previous versions, please read:
 
 ## V4 changes
 
+* v4.0, 2020-02-04, Update project code. 4.0.3
 * v4.0, 2020-01-26, Allow use libsrt.so for SRT is MPL license. 4.0.2
 * v4.0, 2020-01-24, Fix [#1147][bug #1147], support SRT(Secure Reliable Transport). 4.0.1
 
diff --git a/trunk/src/core/srs_core.hpp b/trunk/src/core/srs_core.hpp
index 480e1370c..3f76b2513 100644
--- a/trunk/src/core/srs_core.hpp
+++ b/trunk/src/core/srs_core.hpp
@@ -40,7 +40,7 @@
 
 // The project informations, may sent to client in HTTP header or RTMP metadata.
 #define RTMP_SIG_SRS_KEY "SRS"
-#define RTMP_SIG_SRS_CODE "OuXuli"
+#define RTMP_SIG_SRS_CODE "Leo"
 #define RTMP_SIG_SRS_URL "https://github.com/ossrs/srs"
 #define RTMP_SIG_SRS_LICENSE "MIT"
 #define RTMP_SIG_SRS_AUTHORS "winlin,wenjie,runner365"
diff --git a/trunk/src/core/srs_core_version4.hpp b/trunk/src/core/srs_core_version4.hpp
index 06a31d37c..747be972f 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 2
+#define SRS_VERSION4_REVISION 3
 
 #endif