diff --git a/src/routes/filemanager.js b/src/routes/filemanager.js
index cdd9ccdbb..be9f21c23 100644
--- a/src/routes/filemanager.js
+++ b/src/routes/filemanager.js
@@ -24,7 +24,7 @@ function proxy(req, res, next) {
         let parsedUrl = url.parse(req.url, true /* parseQueryString */);
         parsedUrl.query['access_token'] = result.token;
 
-        req.url = url.format({ pathname: `/files/${id}${req.params[0]}`, query: parsedUrl.query }); // params[0] already contains leading '/'
+        req.url = url.format({ pathname: `/files/${id}/${encodeURIComponent(req.params[0])}`, query: parsedUrl.query }); // params[0] already contains leading '/'
 
         const proxyOptions = url.parse(`https://${result.ip}:3000`);
         proxyOptions.rejectUnauthorized = false;