diff --git a/html/index.d.ts b/html/index.d.ts
index dd6f261eaf..5bcab4a997 100644
--- a/html/index.d.ts
+++ b/html/index.d.ts
@@ -682,7 +682,7 @@ export interface IframeHTMLAttributes extends HTMLAttributes<HTMLIFrameElement>
 	/** @deprecated */
 	frameborder?: number | string | undefined | null;
 	height?: number | string | undefined | null;
-	loading?: "eager" | "lazy" | undefined | null;
+	loading?: 'eager' | 'lazy' | undefined | null;
 	/** @deprecated */
 	marginheight?: number | undefined | null;
 	/** @deprecated */