diff --git a/backend/package.json b/backend/package.json
index 97a7dbc..4c8546a 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "sub-store",
-  "version": "2.16.48",
+  "version": "2.16.49",
   "description": "Advanced Subscription Manager for QX, Loon, Surge, Stash and Shadowrocket.",
   "main": "src/main.js",
   "scripts": {
diff --git a/backend/src/core/proxy-utils/producers/loon.js b/backend/src/core/proxy-utils/producers/loon.js
index ee86009..363a36c 100644
--- a/backend/src/core/proxy-utils/producers/loon.js
+++ b/backend/src/core/proxy-utils/producers/loon.js
@@ -341,10 +341,9 @@ function vmess(proxy) {
     // udp
     if (proxy.udp) {
         result.append(`,udp=true`);
-        const ip_version =
-            ipVersions[proxy['ip-version']] || proxy['ip-version'];
-        result.appendIfPresent(`,ip-mode=${ip_version}`, 'ip-version');
     }
+    const ip_version = ipVersions[proxy['ip-version']] || proxy['ip-version'];
+    result.appendIfPresent(`,ip-mode=${ip_version}`, 'ip-version');
     return result.toString();
 }
 
@@ -416,10 +415,9 @@ function vless(proxy) {
     // udp
     if (proxy.udp) {
         result.append(`,udp=true`);
-        const ip_version =
-            ipVersions[proxy['ip-version']] || proxy['ip-version'];
-        result.appendIfPresent(`,ip-mode=${ip_version}`, 'ip-version');
     }
+    const ip_version = ipVersions[proxy['ip-version']] || proxy['ip-version'];
+    result.appendIfPresent(`,ip-mode=${ip_version}`, 'ip-version');
     return result.toString();
 }