diff --git a/src/plugins/msdoc/index.tsx b/src/plugins/msdoc/index.tsx
index 5cd48f8..c0c65d5 100644
--- a/src/plugins/msdoc/index.tsx
+++ b/src/plugins/msdoc/index.tsx
@@ -26,6 +26,7 @@ const MSDocFTMaps = {
   docx: [
     "docx",
     "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
+    "application/octet-stream"
   ],
   xls: ["xls", "application/vnd.ms-excel"],
   xlsx: [