diff --git a/src/node/hooks/express/apicalls.js b/src/node/hooks/express/apicalls.js
index b72ed11e5..45e38ce45 100644
--- a/src/node/hooks/express/apicalls.js
+++ b/src/node/hooks/express/apicalls.js
@@ -14,18 +14,19 @@ exports.expressCreateServer = (hookName, args, cb) => {
     });
   });
 
+  const parseJserrorForm = async (req) => await new Promise((resolve, reject) => {
+    const form = new formidable.IncomingForm();
+    form.on('error', (err) => reject(err));
+    form.parse(req, (err, fields) => err != null ? reject(err) : resolve(fields.errorInfo));
+  });
+
   // The Etherpad client side sends information about client side javscript errors
-  args.app.post('/jserror', (req, res) => {
-    new formidable.IncomingForm().parse(req, (err, fields, files) => {
-      let data;
-      try {
-        data = JSON.parse(fields.errorInfo);
-      } catch (e) {
-        return res.end();
-      }
+  args.app.post('/jserror', (req, res, next) => {
+    (async () => {
+      const data = JSON.parse(await parseJserrorForm(req));
       clientLogger.warn(`${data.msg} --`, data);
       res.end('OK');
-    });
+    })().catch((err) => next(err || new Error(err)));
   });
 
   // Provide a possibility to query the latest available API version