diff --git a/web/assets/js/util/utils.js b/web/assets/js/util/utils.js
index b56207ab..8927833b 100644
--- a/web/assets/js/util/utils.js
+++ b/web/assets/js/util/utils.js
@@ -134,10 +134,10 @@ class RandomUtil {
         });
     }
 
-    static randomText() {
+    static randomText(minLen = 6, varLen = 5) {
         var chars = 'abcdefghijklmnopqrstuvwxyz1234567890';
         var string = '';
-        var len = 6 + Math.floor(Math.random() * 5);
+        var len = minLen + Math.floor(Math.random() * varLen);
         for (var ii = 0; ii < len; ii++) {
             string += chars[Math.floor(Math.random() * chars.length)];
         }
diff --git a/web/html/xui/form/client.html b/web/html/xui/form/client.html
index 5119a1c1..4db3c425 100644
--- a/web/html/xui/form/client.html
+++ b/web/html/xui/form/client.html
@@ -55,7 +55,7 @@
             </td>
         </tr>
         <tr v-if="client.email">
-            <td>Subscription <a-icon @click="client.subId = RandomUtil.randomText()" type="sync"></a-icon></td>
+            <td>Subscription <a-icon @click="client.subId = RandomUtil.randomText(16,16)" type="sync"></a-icon></td>
             <td>
                 <a-form-item>
                     <a-input v-model.trim="client.subId" style="width: 250px"></a-input>
diff --git a/web/html/xui/form/protocol/shadowsocks.html b/web/html/xui/form/protocol/shadowsocks.html
index fdf2f93c..70a8705e 100644
--- a/web/html/xui/form/protocol/shadowsocks.html
+++ b/web/html/xui/form/protocol/shadowsocks.html
@@ -30,7 +30,7 @@
                     </td>
                 </tr>
                 <tr>
-                    <td>Subscription <a-icon @click="client.subId = RandomUtil.randomText()" type="sync"></a-icon></td>
+                    <td>Subscription <a-icon @click="client.subId = RandomUtil.randomText(16,16)" type="sync"></a-icon></td>
                     <td>
                         <a-form-item v-if="client.email">
                             <a-input v-model.trim="client.subId" style="width: 200px;"></a-input>
diff --git a/web/html/xui/form/protocol/trojan.html b/web/html/xui/form/protocol/trojan.html
index 848eac4f..a6787deb 100644
--- a/web/html/xui/form/protocol/trojan.html
+++ b/web/html/xui/form/protocol/trojan.html
@@ -28,7 +28,7 @@
                 </td>
             </tr>
             <tr>
-                <td>Subscription <a-icon @click="client.subId = RandomUtil.randomText()" type="sync"></a-icon></td>
+                <td>Subscription <a-icon @click="client.subId = RandomUtil.randomText(16,16)" type="sync"></a-icon></td>
                 <td>
                     <a-form-item v-if="client.email">
                         <a-input v-model.trim="client.subId" style="width: 200px;"></a-input>
diff --git a/web/html/xui/form/protocol/vless.html b/web/html/xui/form/protocol/vless.html
index bb23a77f..db381004 100644
--- a/web/html/xui/form/protocol/vless.html
+++ b/web/html/xui/form/protocol/vless.html
@@ -39,7 +39,7 @@
                 </td>
             </tr>
             <tr>
-                <td>Subscription <a-icon @click="client.subId = RandomUtil.randomText()" type="sync"></a-icon></td>
+                <td>Subscription <a-icon @click="client.subId = RandomUtil.randomText(16,16)" type="sync"></a-icon></td>
                 <td>
                     <a-form-item v-if="client.email">
                         <a-input v-model.trim="client.subId" style="width: 200px;"></a-input>
diff --git a/web/html/xui/form/protocol/vmess.html b/web/html/xui/form/protocol/vmess.html
index c03dee07..3e8e4875 100644
--- a/web/html/xui/form/protocol/vmess.html
+++ b/web/html/xui/form/protocol/vmess.html
@@ -36,7 +36,7 @@
                 </td>
             </tr>
             <tr>
-                <td>Subscription <a-icon @click="client.subId = RandomUtil.randomText()" type="sync"></a-icon></td>
+                <td>Subscription <a-icon @click="client.subId = RandomUtil.randomText(16,16)" type="sync"></a-icon></td>
                 <td>
                     <a-form-item v-if="client.email">
                         <a-input v-model.trim="client.subId" style="width: 200px;"></a-input>