diff --git a/packages/ui-default/backendlib/markdown-it-media.js b/packages/ui-default/backendlib/markdown-it-media.js
index 1002a04c0..a73001cc2 100644
--- a/packages/ui-default/backendlib/markdown-it-media.js
+++ b/packages/ui-default/backendlib/markdown-it-media.js
@@ -2,7 +2,7 @@
 /* eslint-disable prefer-destructuring */
 
 const { randomUUID } = require('crypto');
-const { escapeHtml } = require('vj/../../node_modules/markdown-it/lib/common/utils');
+const { escapeHtml } = require('markdown-it/lib/common/utils');
 
 /* eslint-disable no-restricted-properties */
 const ytRegex = /^.*((youtu.be\/)|(v\/)|(\/u\/\w\/)|(embed\/)|(watch\?))\??v?=?([^#&?]*).*/;
@@ -120,7 +120,7 @@ module.exports = function videoPlugin(md) {
         + '    }); </script>';
     }
     if (service === 'pdf') {
-      if (videoID.startsWith('file://')) videoID += '?noDisposition=1';
+      if (videoID.startsWith('file://')) videoID += videoID.includes('?') ? '&noDisposition=1' : '?noDisposition=1';
       return `\
         <object classid="clsid:${randomUUID().toUpperCase()}">
           <param name="SRC" value="${videoID}" >
diff --git a/packages/ui-default/package.json b/packages/ui-default/package.json
index 79a5258c4..5ffb29aa6 100644
--- a/packages/ui-default/package.json
+++ b/packages/ui-default/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.27.14",
+  "version": "4.27.15",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",