diff --git a/backend/bundle-esbuild.js b/backend/bundle-esbuild.js
index 26ca95b..05d6bd6 100644
--- a/backend/bundle-esbuild.js
+++ b/backend/bundle-esbuild.js
@@ -4,6 +4,10 @@ const path = require('path');
 const { build } = require('esbuild');
 
 !(async () => {
+    const version = JSON.parse(
+        fs.readFileSync(path.join(__dirname, 'package.json'), 'utf-8'),
+    ).version.trim();
+
     const artifacts = [
         { src: 'src/main.js', dest: 'sub-store.min.js' },
         {
@@ -54,6 +58,16 @@ const { build } = require('esbuild');
         format: 'cjs',
         outfile: 'dist/sub-store.bundle.js',
     });
+    fs.writeFileSync(
+        path.join(__dirname, 'dist/sub-store.bundle.js'),
+        `// SUB_STORE_BACKEND_VERSION: ${version}
+${fs.readFileSync(path.join(__dirname, 'dist/sub-store.bundle.js'), {
+    encoding: 'utf8',
+})}`,
+        {
+            encoding: 'utf8',
+        },
+    );
 })()
     .catch((e) => {
         console.log(e);
diff --git a/backend/bundle.js b/backend/bundle.js
index da61ded..e196153 100644
--- a/backend/bundle.js
+++ b/backend/bundle.js
@@ -3,23 +3,49 @@ const fs = require('fs');
 const path = require('path');
 const { build } = require('esbuild');
 
-let content = fs.readFileSync(path.join(__dirname, 'sub-store.min.js'), {
-    encoding: 'utf8',
-});
-content = content.replace(
-    /eval\(('|")(require\(('|").*?('|")\))('|")\)/g,
-    '$2',
-);
-fs.writeFileSync(path.join(__dirname, 'dist/sub-store.no-bundle.js'), content, {
-    encoding: 'utf8',
-});
+!(async () => {
+    const version = JSON.parse(
+        fs.readFileSync(path.join(__dirname, 'package.json'), 'utf-8'),
+    ).version.trim();
 
-build({
-    entryPoints: ['dist/sub-store.no-bundle.js'],
-    bundle: true,
-    minify: true,
-    sourcemap: true,
-    platform: 'node',
-    format: 'cjs',
-    outfile: 'dist/sub-store.bundle.js',
-});
+    let content = fs.readFileSync(path.join(__dirname, 'sub-store.min.js'), {
+        encoding: 'utf8',
+    });
+    content = content.replace(
+        /eval\(('|")(require\(('|").*?('|")\))('|")\)/g,
+        '$2',
+    );
+    fs.writeFileSync(
+        path.join(__dirname, 'dist/sub-store.no-bundle.js'),
+        content,
+        {
+            encoding: 'utf8',
+        },
+    );
+
+    await build({
+        entryPoints: ['dist/sub-store.no-bundle.js'],
+        bundle: true,
+        minify: true,
+        sourcemap: true,
+        platform: 'node',
+        format: 'cjs',
+        outfile: 'dist/sub-store.bundle.js',
+    });
+    fs.writeFileSync(
+        path.join(__dirname, 'dist/sub-store.bundle.js'),
+        `// SUB_STORE_BACKEND_VERSION: ${version}
+${fs.readFileSync(path.join(__dirname, 'dist/sub-store.bundle.js'), {
+    encoding: 'utf8',
+})}`,
+        {
+            encoding: 'utf8',
+        },
+    );
+})()
+    .catch((e) => {
+        console.log(e);
+    })
+    .finally(() => {
+        console.log('done');
+    });
diff --git a/backend/package.json b/backend/package.json
index 0d0e425..77b29e3 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "sub-store",
-  "version": "2.14.204",
+  "version": "2.14.205",
   "description": "Advanced Subscription Manager for QX, Loon, Surge, Stash and ShadowRocket.",
   "main": "src/main.js",
   "scripts": {