diff --git a/packages/core/src/readers/NotionReader.ts b/packages/core/src/readers/NotionReader.ts
index b7512c8cb4d7cf0af5b2133cf5e163d834a5d715..0b4569d8ff1220ad13b08e99323d0a92845405d5 100644
--- a/packages/core/src/readers/NotionReader.ts
+++ b/packages/core/src/readers/NotionReader.ts
@@ -42,7 +42,11 @@ export class NotionReader implements BaseReader {
   toDocuments(pages: Pages): Document[] {
     return Object.values(pages).map((page) => {
       const text = pageToString(page);
-      return new Document({ text, metadata: page.metadata });
+      return new Document({
+        id_: page.metadata.id, // Use the Notion-provided UUID for the document
+        text,
+        metadata: page.metadata,
+      });
     });
   }