diff --git a/doxygen-config b/doxygen-config
index e25c196..c1c7f4f 100644
--- a/doxygen-config
+++ b/doxygen-config
@@ -1,3 +1,8 @@
+/* Copyright (c) 2020 vesoft inc. All rights reserved.
+ *
+ * This source code is licensed under Apache 2.0 License.
+ */
+ 
 # Doxyfile 1.10.0
 
 # This file describes the settings to be used by the documentation system