diff --git a/src/generator/download.ts b/src/generator/download.ts
index 085cb90122..8f6e7f2d55 100644
--- a/src/generator/download.ts
+++ b/src/generator/download.ts
@@ -66,7 +66,7 @@ export async function downloadDiscoveryDocs(
     : 'json';
   console.log(`sending request to ${options.discoveryUrl}`);
   const res = await request({url: options.discoveryUrl, headers});
-  const apis = (JSON.parse(res.data as string)).items as gapi.Schema[];
+  const apis = (JSON.parse(res.data as string)).items as gapi.Schemas;
   const indexPath = path.join(options.downloadPath, 'index.json');
   gfs.writeFile(indexPath, JSON.parse(res.data as string));
   const queue = new Q({concurrency: 25});