diff --git a/packages/ui-default/backendlib/markdown-it-media.ts b/packages/ui-default/backendlib/markdown-it-media.ts
index 591c1e063..73ff6618e 100644
--- a/packages/ui-default/backendlib/markdown-it-media.ts
+++ b/packages/ui-default/backendlib/markdown-it-media.ts
@@ -124,6 +124,12 @@ export function Media(md: MarkdownIt) {
           scrolling="no" border="0" frameborder="no" framespacing="0" width="100%" style="min-height:500px" ${allowFullScreen}></iframe>
       `;
     }
+    if (service === 'msoffice') {
+      return `\
+        <iframe src="https://view.officeapps.live.com/op/view.aspx?src=${encodeURIComponent(src)}"
+        scrolling="no" border="0" frameborder="no" framespacing="0" width="100%" style="min-height:500px" ${allowFullScreen}></iframe>
+      `;
+    }
     if (service === 'pdf') {
       if (src.startsWith('file://')) src += src.includes('?') ? '&noDisposition=1' : '?noDisposition=1';
       return `\
diff --git a/packages/ui-default/package.json b/packages/ui-default/package.json
index 58c963179..b58ebf8a6 100644
--- a/packages/ui-default/package.json
+++ b/packages/ui-default/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.38.18",
+  "version": "4.38.19",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",