diff --git a/doc/udpspeeder_openvpn.md b/doc/udpspeeder_openvpn.md
index bcb9a0e..0fa4e1c 100644
--- a/doc/udpspeeder_openvpn.md
+++ b/doc/udpspeeder_openvpn.md
@@ -87,7 +87,7 @@ rcvbuf 2000000      ##### important
 txqueuelen 4000     ##### suggested
 ```
 
-#### Note
+##### Note:
 If you use the `redirect-gateway` option of OpenVPN,you may need to add a route exception to your remote server ip at client side.Otherwise OpenVPN may hijack UDPspeeder 's traffic.
 
 For example,depend on your network environment,the command may looks like: