diff --git a/source/background-scripts/initialize.ts b/source/background-scripts/initialize.ts
index 9fd67f1..985b5c8 100644
--- a/source/background-scripts/initialize.ts
+++ b/source/background-scripts/initialize.ts
@@ -16,6 +16,16 @@ browser.runtime.onInstalled.addListener(async () => {
   if (import.meta.env.DEV) {
     await browser.runtime.openOptionsPage();
   }
+
+  const {dataVersion} = await browser.storage.sync.get({
+    dataVersion: '0',
+  });
+
+  if (dataVersion === '0') {
+    const local = await browser.storage.local.get();
+    local.dataVersion = '1';
+    await browser.storage.sync.set(local);
+  }
 });
 
 browser.webNavigation.onBeforeNavigate.addListener(async (details) => {