diff --git a/lib/response.js b/lib/response.js
index b94f473..8191e74 100644
--- a/lib/response.js
+++ b/lib/response.js
@@ -320,7 +320,7 @@ function actionPDF (req, res, note) {
     res.setHeader('Content-Type', 'application/pdf; charset=UTF-8')
     res.setHeader('X-Robots-Tag', 'noindex, nofollow') // prevent crawling
     stream.pipe(res)
-    fs.unlink(path)
+    fs.unlinkSync(path)
   })
 }