diff --git a/bin/beacon.js b/bin/beacon.js
index bb66eba..fd74d26 100755
--- a/bin/beacon.js
+++ b/bin/beacon.js
@@ -11,8 +11,12 @@ const fs = require('fs');
 const os = require('os');
 const path = require('path');
 
-const VERSION = '1.0.0';
 const PKG_ROOT = path.join(__dirname, '..');
+let VERSION = '1.0.0';
+try {
+  const pkg = require(path.join(PKG_ROOT, 'package.json'));
+  if (pkg && pkg.version) VERSION = pkg.version;
+} catch (_) {}
 
 const INSTALL_DIR = path.join(os.homedir(), '.beacon', 'npm');
 const VENV_DIR = path.join(INSTALL_DIR, 'venv');
diff --git a/tests/test_npm_wrapper.py b/tests/test_npm_wrapper.py
new file mode 100644
index 0000000..77b7c9e
--- /dev/null
+++ b/tests/test_npm_wrapper.py
@@ -0,0 +1,23 @@
+import json
+import os
+import subprocess
+import unittest
+
+class TestNpmWrapper(unittest.TestCase):
+    def test_version_matches_package_json(self):
+        repo_root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+        pkg_json_path = os.path.join(repo_root, "package.json")
+        beacon_js_path = os.path.join(repo_root, "bin", "beacon.js")
+
+        with open(pkg_json_path, "r", encoding="utf-8") as f:
+            pkg_data = json.load(f)
+        expected_version = pkg_data.get("version")
+
+        res = subprocess.run(
+            ["node", beacon_js_path, "--version"],
+            capture_output=True, text=True, check=True
+        )
+        self.assertEqual(res.stdout.strip(), expected_version)
+
+if __name__ == "__main__":
+    unittest.main()