diff --git a/receivers/common/web/TcpListenerService.ts b/receivers/common/web/TcpListenerService.ts
index beb9c14..ef98273 100644
--- a/receivers/common/web/TcpListenerService.ts
+++ b/receivers/common/web/TcpListenerService.ts
@@ -48,7 +48,7 @@ export class TcpListenerService {
     }
 
     disconnect(connectionId: string) {
-        this.sessionMap[connectionId].socket.destroy();
+        this.sessionMap[connectionId]?.socket.destroy();
     }
 
     private async handleServerError(err: NodeJS.ErrnoException) {
diff --git a/receivers/common/web/WebSocketListenerService.ts b/receivers/common/web/WebSocketListenerService.ts
index b37b122..b36c4e7 100644
--- a/receivers/common/web/WebSocketListenerService.ts
+++ b/receivers/common/web/WebSocketListenerService.ts
@@ -47,7 +47,7 @@ export class WebSocketListenerService {
     }
 
     disconnect(connectionId: string) {
-        this.sessionMap[connectionId].close();
+        this.sessionMap[connectionId]?.close();
     }
 
     private async handleServerError(err: NodeJS.ErrnoException) {