diff --git a/lighthouse-extension/gulpfile.js b/lighthouse-extension/gulpfile.js
index ace721e2526c..92d877585427 100644
--- a/lighthouse-extension/gulpfile.js
+++ b/lighthouse-extension/gulpfile.js
@@ -22,9 +22,12 @@ const pkg = require('../package.json');
 const distDir = 'dist';
 
 // HACK: patch astw, see https://github.com/GoogleChrome/lighthouse/issues/5152
+const acornPath = require.resolve('acorn');
 const ASTW_PATH = require.resolve('astw/index.js');
 const astwOriginalContent = fs.readFileSync(ASTW_PATH, 'utf8');
-const astwPatchedContent = astwOriginalContent.replace(/ecmaVersion: .* 8,/, 'ecmaVersion: 2018,');
+const astwPatchedContent = astwOriginalContent
+  .replace(/ecmaVersion: .* 8,/, 'ecmaVersion: 2018,')
+  .replace(/require\('acorn'\)/, `require("${acornPath}")`);
 fs.writeFileSync(ASTW_PATH, astwPatchedContent);
 
 const VERSION = pkg.version;