diff --git a/script/common.sh b/script/common.sh
index a31774e..d7b5f33 100644
--- a/script/common.sh
+++ b/script/common.sh
@@ -194,7 +194,7 @@ function _error_quit() {
 
 _is_bind() {
     local port=$1
-    { ss -tulnp || netstat -tulnp; } | grep ":${port}\b"
+    { sudo ss -tulnp || sudo netstat -tulnp; } | grep ":${port}\b"
 }
 
 _is_already_in_use() {