diff --git a/lib/notion/getPostBlocks.js b/lib/notion/getPostBlocks.js
index fb486d61..97b70af7 100644
--- a/lib/notion/getPostBlocks.js
+++ b/lib/notion/getPostBlocks.js
@@ -143,7 +143,8 @@ function convertNotionBlocksToPost(id, blockMap, slice) {
         b?.value?.type === 'pdf' ||
         b?.value?.type === 'video' ||
         b?.value?.type === 'audio') &&
-      b?.value?.properties?.source?.[0][0]
+      b?.value?.properties?.source?.[0][0] &&
+      b?.value?.properties?.source?.[0][0].indexOf('attachment') === 0
     ) {
       const oldUrl = b?.value?.properties?.source?.[0][0]
       const newUrl = `https://notion.so/signed/${encodeURIComponent(oldUrl)}?table=block&id=${b?.value?.id}`