diff --git a/packages/backend/src/server/api/streaming.ts b/packages/backend/src/server/api/streaming.ts
index dff353c2e..8bf985fc2 100644
--- a/packages/backend/src/server/api/streaming.ts
+++ b/packages/backend/src/server/api/streaming.ts
@@ -16,6 +16,10 @@ export const initializeStreamingServer = (server: http.Server): void => {
 
 	ws.on('request', async (request): Promise<void> => {
 		const q = request.resourceURL.query as ParsedUrlQuery;
+		if (q.i instanceof Array) {
+			request.reject(400);
+			return;
+		}
 
 		const [user, app] = await authenticate(request.httpRequest.headers.authorization, q.i)
 			.catch(err => {