diff --git a/scripts/mp-weixin.patch.js b/scripts/mp-weixin.patch.js
index 8f4118d..979baed 100644
--- a/scripts/mp-weixin.patch.js
+++ b/scripts/mp-weixin.patch.js
@@ -102,22 +102,22 @@ async function commonPatch(mode = 'production') {
 
     let vendorContent = await fsp.readFile(vendorPath, 'utf8');
 
-    const requireLine = 'const site = require("../site");';
-    const versionLine = 'const __app_version = require("../version");';
-    // 检查文件开头（例如前 1000 字符）是否已经包含这些 require 语句
-    const inspectPrefix = vendorContent.slice(0, 1000);
-    const hasSiteRequire = new RegExp(
-      '^\\s*const\\s+site\\s*=\\s*require\\s*\\([\'"]\\.\\./site[\'"]\\);?',
-      'm'
-    ).test(inspectPrefix);
-    const hasVersionRequire = new RegExp(
-      '^\\s*const\\s+__app_version\\s*=\\s*require\\s*\\([\'"]\\.\\./version[\'"]\\);?',
-      'm'
-    ).test(inspectPrefix);
+    const requireLines = [
+      'const site = require("../site");',
+      'const __app_version = require("../version");'
+    ];
 
-    if (hasSiteRequire && hasVersionRequire) {
-      console.log('vendor.js 开头已包含 require 语句，跳过追加。');
-      return;
+    // 清理已有的重复注入（兼容新旧格式：../version.json 和 ../version）
+    let cleaned = false;
+    const injectPatterns = [
+      /^\s*const\s+site\s*=\s*require\s*\(['"]\.\.\/site(\.js)?['"]\);?\s*\r?\n/gm,
+      /^\s*const\s+__app_version\s*=\s*require\s*\(['"]\.\.\/version(\.json)?['"]\);?\s*\r?\n/gm,
+    ];
+    for (const pattern of injectPatterns) {
+      if (pattern.test(vendorContent)) {
+        vendorContent = vendorContent.replace(pattern, '');
+        cleaned = true;
+      }
     }
 
     // 把 require 语句 + newline 插入文件最前面。
@@ -131,13 +131,9 @@ async function commonPatch(mode = 'production') {
       vendorContent = vendorContent.slice(1);
     }
 
-    const linesToInject = [requireLine];
-    if (!hasVersionRequire) {
-      linesToInject.push(versionLine);
-    }
-    const newContent = prefix + linesToInject.join(eol) + eol + vendorContent;
+    const newContent = prefix + requireLines.join(eol) + eol + vendorContent;
     await fsp.writeFile(vendorPath, newContent, 'utf8');
-    console.log(`已在 vendor.js 开头追加: ${linesToInject.join(', ')}`);
+    console.log(cleaned ? `已清理旧注入并重新注入: ${requireLines.join(', ')}` : `已在 vendor.js 开头追加: ${requireLines.join(', ')}`);
   } catch (err) {
     console.error('发生错误:', err);
     process.exitCode = 1;