diff --git a/src/libs/getExtensionVersion.js b/src/libs/getExtensionVersion.js
index bb27130..a0d256b 100644
--- a/src/libs/getExtensionVersion.js
+++ b/src/libs/getExtensionVersion.js
@@ -1 +1,6 @@
-export default () => chrome.runtime.getManifest().version
+export default () => {
+  const {version, version_name} = chrome.runtime.getManifest()
+
+  // version_name 字段用于存放 beta 版本号，为空时表示正式版
+  return version_name || version
+}