diff --git a/bin/tls.sh b/bin/tls.sh
index b7b4abd..6b9c6c2 100644
--- a/bin/tls.sh
+++ b/bin/tls.sh
@@ -69,3 +69,10 @@ update_acme_tls(){
     sed -i "s/你的域名/$USER_DOMAIN/g" "$CONFIG_FILE"
     sed -i "s/你的Cloudflare_API_Token/$CLOUDFLARE_TOKEN/g" "$CONFIG_FILE"
 }
+
+# 修改ACME域名
+update_acme_domain(){
+    local CONFIG_FILE="${1}" # 配置文件
+    local DOMAIN="${2}"   # 域名
+    modify_json_file  "$CONFIG_FILE" ".inbounds[0].tls.acme.domain[0]" "$DOMAIN"
+}
diff --git a/install.sh b/install.sh
index 74dfb28..f222187 100644
--- a/install.sh
+++ b/install.sh
@@ -77,9 +77,8 @@ ask_update_domain(){
   modify_json_file  "$CONFIG_FILE" ".inbounds[0].tls.server_name" "$DOMAIN"
 
   # 是否存在acme域名, 存在则修改
-  local ACME_EXISTS=$(jq -r 'has("inbounds") and (.inbounds[0] | has("tls")) and (.inbounds[0].tls | has("acme"))' "$CONFIG_FILE")  
-  if [[ "$ACME_EXISTS" == "true" ]]; then
-      modify_json_file  "$CONFIG_FILE" ".inbounds[0].tls.acme.domain[0]" "$DOMAIN"
+  if is_config_use_acme "$CONFIG_FILE"; then
+      update_acme_domain "$CONFIG_FILE" "$DOMAIN"
   fi  
 
   echo "修改域名成功"