diff --git a/README.md b/README.md
index 8ca0eb7..55ecd20 100644
--- a/README.md
+++ b/README.md
@@ -32,4 +32,8 @@ accountId = account id of the unit on which you are doing the test
 producer = it will always be true because you are the producer
 (it's possible to put false, but then you have to have another client with producer true)
 assetName = asset name of the unit on which you are doing the test
-assetType = asset type of the unit on which you are doing the test
\ No newline at end of file
+assetType = asset type of the unit on which you are doing the test
+
+### Demo project
+  The demo project used initially and then modified for our needs `https://github.com/jamalag/mediasoup2`
+
diff --git a/app.js b/app.js
index eb2a16d..dfaf6f1 100644
--- a/app.js
+++ b/app.js
@@ -186,10 +186,10 @@ peers.on('connection', async socket => {
     try {
       const callId = socketDetails[socket.id];
       console.log(`[createWebRtcTransport] sender ${sender} | callId ${callId}`);
-      if (sender) {
-        videoCalls[callId].producerTransport = await createWebRtcTransportLayer(callId, callback);
-      } else {
-        videoCalls[callId].consumerTransport = await createWebRtcTransportLayer(callId, callback);
+      if (sender && !videoCalls[callId].producerTransport) {
+        videoCalls[callId].producerTransport = await createWebRtcTransportLayer(callId, callback)
+      } else if (!sender && !videoCalls[callId].consumerTransport) {
+        videoCalls[callId].consumerTransport = await createWebRtcTransportLayer(callId, callback)
       }
     } catch (error) {
       console.log(`ERROR | createWebRtcTransport | callId ${callId} | sender ${sender} | ${error.message}`);