diff --git a/index.d.ts b/index.d.ts
index a4a369c..7c6385e 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -16,7 +16,7 @@ declare module 'react-frame-component' {
   export default FrameComponent;
 
   export interface FrameContextProps {
-    document?: HTMLDocument;
+    document?: Document;
     window?: Window;
   }