diff --git a/src/routes/filemanager.js b/src/routes/filemanager.js
index fb8a73c0c..fd34814cb 100644
--- a/src/routes/filemanager.js
+++ b/src/routes/filemanager.js
@@ -28,7 +28,7 @@ function proxy(kind) {
         const [error, result] = await safe(services.getContainerDetails('sftp', 'CLOUDRON_SFTP_TOKEN'));
         if (error) return next(BoxError.toHttpError(error));
 
-        let parsedUrl = url.parse(req.url, true /* parseQueryString */);
+        const parsedUrl = url.parse(req.url, true /* parseQueryString */);
         parsedUrl.query['access_token'] = result.token;
 
         req.url = url.format({ pathname: `/files/${id}/${encodeURIComponent(req.params[0])}`, query: parsedUrl.query }); // params[0] already contains leading '/'