diff --git a/utils/protocol-types-generator/index.js b/utils/protocol-types-generator/index.js
index 4ff2d38440..5ca9ce37b4 100644
--- a/utils/protocol-types-generator/index.js
+++ b/utils/protocol-types-generator/index.js
@@ -10,11 +10,13 @@ async function generateChromiunProtocol(revision) {
   if (revision.local && fs.existsSync(outputPath))
     return;
   const playwright = await require('../../index').chromium;
-  const browser = await playwright.launch({ executablePath: revision.executablePath });
+  const browserServer = await playwright.launchServer({ executablePath: revision.executablePath });
+  const origin = browserServer.wsEndpoint().match(/ws:\/\/([0-9A-Za-z:\.]*)\//)[1];
+  const browser = await playwright.connect({ wsEndpoint: browserServer.wsEndpoint() });
   const page = await browser.newPage();
   await page.goto(`http://${origin}/json/protocol`);
   const json = JSON.parse(await page.evaluate(() => document.documentElement.innerText));
-  await browser.close();
+  await browserServer.kill();
   fs.writeFileSync(outputPath, jsonToTS(json));
   console.log(`Wrote protocol.ts to ${path.relative(process.cwd(), outputPath)}`);
 }