diff --git a/src/app-server/client.ts b/src/app-server/client.ts
index d741f390..2c022634 100644
--- a/src/app-server/client.ts
+++ b/src/app-server/client.ts
@@ -165,7 +165,7 @@ export class AppServerClient {
   }
 
   isConnected(): boolean {
-    return this.initialized && this.transport !== null && this.transport.isRunning();
+    return this.initialized && this.transport?.isRunning() === true;
   }
 
   get initializeResponse(): InitializeResponse {