diff --git a/Insufficient-permissions-when-using-certificates.md b/Insufficient-permissions-when-using-certificates.md
index e7cadaa..fa4e766 100644
--- a/Insufficient-permissions-when-using-certificates.md
+++ b/Insufficient-permissions-when-using-certificates.md
@@ -83,11 +83,11 @@ uid=65534(nobody) gid=65534(nobody) groups=65534(nobody)
 
 #!/bin/bash
 
-DOMAIN='example.com'
+V2RAY_DOMAIN='example.com'
 
-if [[ "$RENEWED_LINEAGE" == "/etc/letsencrypt/live/$DOMAIN" ]]; then
-    install -m 644 -o nobody -g nogroup "/etc/letsencrypt/live/$DOMAIN/fullchain.pem" -t /etc/ssl/v2ray/
-    install -m 600 -o nobody -g nogroup "/etc/letsencrypt/live/$DOMAIN/privkey.pem" -t /etc/ssl/v2ray/
+if [[ "$RENEWED_LINEAGE" == "/etc/letsencrypt/live/$V2RAY_DOMAIN" ]]; then
+    install -m 644 -o nobody -g nogroup "/etc/letsencrypt/live/$V2RAY_DOMAIN/fullchain.pem" -t /etc/ssl/v2ray/
+    install -m 600 -o nobody -g nogroup "/etc/letsencrypt/live/$V2RAY_DOMAIN/privkey.pem" -t /etc/ssl/v2ray/
 
     sleep "$((RANDOM % 2048))"
     systemctl restart v2ray.service