diff --git a/doxygen/footer.html b/doxygen/footer.html
index 2c687c56..38d6ea0f 100644
--- a/doxygen/footer.html
+++ b/doxygen/footer.html
@@ -3,9 +3,11 @@
 <p style="text-align: right;padding-right: 12px;">
 	XZ logo &copy; 2023 by Jia Tan is licensed under
 	<a href="COPYING.CC-BY-SA-4.0"
-	   target="_blank"
-	   rel="license noopener noreferrer"
+	   rel="license"
 	   style="display:inline-block;">
 		CC BY-SA 4.0
 	</a>
 </p>
+
+</body>
+</html>