diff --git a/src/mfm/html-to-mfm.ts b/src/mfm/html-to-mfm.ts
index 6da1dbdad33097e88af05811100527f31911b0cb..aa887c556011fd0d96a9ce42507b456b940cd0d0 100644
--- a/src/mfm/html-to-mfm.ts
+++ b/src/mfm/html-to-mfm.ts
@@ -1,4 +1,5 @@
 const parse5 = require('parse5');
+import { URL } from 'url';
 
 export default function(html: string): string {
 	if (html == null) return null;