diff --git a/backend/src/middlewares/request-validators/participant-validator.middleware.ts b/backend/src/middlewares/request-validators/participant-validator.middleware.ts
index a2536f6..502c7b2 100644
--- a/backend/src/middlewares/request-validators/participant-validator.middleware.ts
+++ b/backend/src/middlewares/request-validators/participant-validator.middleware.ts
@@ -1,9 +1,10 @@
 import { TokenOptions } from '@typings-ce';
 import { Request, Response, NextFunction } from 'express';
 import { z } from 'zod';
+import { nonEmptySanitizedRoomId } from './room-validator.middleware.js';
 
 const ParticipantTokenRequestSchema: z.ZodType<TokenOptions> = z.object({
-	roomId: z.string().nonempty('Room ID is required'),
+	roomId: nonEmptySanitizedRoomId('roomId'),
 	participantName: z.string().nonempty('Participant name is required'),
 	secret: z.string().nonempty('Secret is required')
 });