diff --git a/backend/package.json b/backend/package.json
index 3dd3665..4bf1692 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "sub-store",
-  "version": "2.19.68",
+  "version": "2.19.69",
   "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/sing-box.js b/backend/src/core/proxy-utils/producers/sing-box.js
index f059661..f3d8d82 100644
--- a/backend/src/core/proxy-utils/producers/sing-box.js
+++ b/backend/src/core/proxy-utils/producers/sing-box.js
@@ -521,7 +521,8 @@ const vlessParser = (proxy = {}) => {
         throw 'invalid port';
     if (proxy.xudp) parsedProxy.packet_encoding = 'xudp';
     if (proxy['fast-open']) parsedProxy.udp_fragment = true;
-    if (proxy.flow === 'xtls-rprx-vision') parsedProxy.flow = proxy.flow;
+    // if (['xtls-rprx-vision', ''].includes(proxy.flow)) parsedProxy.flow = proxy.flow;
+    if (proxy.flow != null) parsedProxy.flow = proxy.flow;
     if (proxy.network === 'ws') wsParser(proxy, parsedProxy);
     if (proxy.network === 'grpc') grpcParser(proxy, parsedProxy);
     networkParser(proxy, parsedProxy);