diff --git a/doxygen-config b/doxygen-config
index 63d7992..64b2c92 100644
--- a/doxygen-config
+++ b/doxygen-config
@@ -53,7 +53,7 @@ PROJECT_NAME           = "NebulaGraph CPP Client"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = master
+PROJECT_NUMBER         = release-3.8
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a