diff --git a/client/injected.ts b/client/injected.ts
index 20cf535..d1fff70 100644
--- a/client/injected.ts
+++ b/client/injected.ts
@@ -192,7 +192,7 @@ if ('WebSocket' in window && !block) {
       _diffDOMStatus = 'loading'
       return new Promise(resolve => {
         const baseurl = new URL(script.src).pathname.split('/').slice(0, -1).join('/')
-        const url = `//${new URL(script.src).host}${baseurl}/fiveserver/scripts/diffDOM.js`
+        const url = `//${new URL(script.src).host}${baseurl}/fiveserver/scripts/diffDOM/diffDOM.js`
         const s = document.createElement('script')
         s.type = 'text/javascript'
         s.src = url
diff --git a/public/scripts/diffDOM/LICENSE.js b/public/scripts/diffDOM/LICENSE.js
new file mode 100644
index 0000000..c313926
--- /dev/null
+++ b/public/scripts/diffDOM/LICENSE.js
@@ -0,0 +1,5 @@
+/**
+ * @copyright     Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ * @license       ${link https://github.com/fiduswriter/diffDOM/blob/main/LICENSE.txt | LGPL-3.0}
+ * @description   diffDOM.js and diffDOM.js.map are copied from https://github.com/fiduswriter/diffDOM
+ */
diff --git a/public/scripts/diffDOM.js b/public/scripts/diffDOM/diffDOM.js
similarity index 100%
rename from public/scripts/diffDOM.js
rename to public/scripts/diffDOM/diffDOM.js
diff --git a/public/scripts/diffDOM.js.map b/public/scripts/diffDOM/diffDOM.js.map
similarity index 100%
rename from public/scripts/diffDOM.js.map
rename to public/scripts/diffDOM/diffDOM.js.map