diff --git a/udp2raw-openvpn-config-guide.md b/udp2raw-openvpn-config-guide.md
index f89d1b3..c82653d 100644
--- a/udp2raw-openvpn-config-guide.md
+++ b/udp2raw-openvpn-config-guide.md
@@ -39,7 +39,9 @@ keepalive 3 20
 verb 3
 mute 20
 
-comp-lzo no
+comp-lzo no   #this option is deprecated since openvpn2.4. For 2.4 and above, use "compress" instead
+#compress
+
 cipher none      ##### disable openvpn 's cipher and auth for maxmized peformance. 
 auth none        ##### you can enable openvpn's cipher and auth,if you dont care about peformance,or you dont trust udp2raw 's encryption
 
@@ -81,7 +83,9 @@ status /etc/openvpn/openvpn-status.log
 verb 3
 mute 20  
 
-comp-lzo no
+comp-lzo no   #this option is deprecated since openvpn2.4. For 2.4 and above, use "compress" instead
+#compress
+
 cipher none      ##### disable openvpn 's cipher and auth for maxmized peformance. 
 auth none        ##### you can enable openvpn's cipher and auth,if you dont care about peformance,or you dont trust udp2raw 's encryption