diff --git a/bin/update_reality_dest.sh b/bin/update_reality_dest.sh
index a461a99..d1f6d8f 100644
--- a/bin/update_reality_dest.sh
+++ b/bin/update_reality_dest.sh
@@ -14,6 +14,12 @@ if [[ -z "$dest" ]]; then
     exit 1
 fi
 
+# 如果未指定端口号默认加上 :443
+if [[ "$dest" != *:* ]]; then
+    dest="${dest}:443"
+    echo "未检测到端口号，已自动添加默认端口 :443"
+fi
+
 domain=$(echo "$dest" | awk -F ':' '{print $1}')