diff --git a/app.js b/app.js
index 82b7682..6957b2a 100644
--- a/app.js
+++ b/app.js
@@ -369,6 +369,7 @@ peers.on('connection', async socket => {
     try {
       const callId = socketDetails[socket.id];
       console.log(`[transport-recv-connect] socket ${socket.id} | callId ${callId}`);
+      if (typeof dtlsParameters === 'string') dtlsParameters = JSON.parse(dtlsParameters);
       // await videoCalls[callId].consumerTransport.connect({ dtlsParameters });
       if(!isInitiator(callId, socket.id)) {
         await videoCalls[callId].receiverConsumerTransport.connect({ dtlsParameters });
@@ -392,6 +393,8 @@ peers.on('connection', async socket => {
       const callId = socketDetails[socket.id];
       console.log(`[consume] socket ${socket.id} | callId ${callId} | rtpCapabilities: ${JSON.stringify(rtpCapabilities)}`);
 
+      if (typeof rtpCapabilities === 'string') rtpCapabilities = JSON.parse(rtpCapabilities);
+
       console.log('[consume] callId', callId);
       let canConsumeVideo, canConsumeAudio;
       if (isInitiator(callId, socket.id)) {