diff --git a/ui/packages/app/src/main.ts b/ui/packages/app/src/main.ts
index bef47112837fc..ffd8dbc89ad46 100644
--- a/ui/packages/app/src/main.ts
+++ b/ui/packages/app/src/main.ts
@@ -96,8 +96,8 @@ function create_custom_element() {
 			});
 		}
 	}
-
-	customElements.define("gradio-app", GradioApp);
+	if (!customElements.get("gradio-app"))
+		customElements.define("gradio-app", GradioApp);
 }
 
 create_custom_element();