diff --git a/client/src/service/peer.js b/client/src/service/peer.js
index 159d170..b5f60cc 100644
--- a/client/src/service/peer.js
+++ b/client/src/service/peer.js
@@ -1,6 +1,6 @@
 class PeerService {
     constructor() {
-        if (!this.peer) {
+        if (typeof window !== 'undefined' && !this.peer) {
             this.peer = new RTCPeerConnection({
                 iceServers: [{
                     urls: [