diff --git a/manifest.json b/manifest.json
index fa3ce5cf..a13a85be 100644
--- a/manifest.json
+++ b/manifest.json
@@ -59,7 +59,7 @@
     "content_scripts": [
         {
             "matches": ["https://*.chatgpt.com/*"],
-            "js": ["js/tb115_segmenter/tb115_loader.js"],
+            "js": ["js/tb115_segmenter/tb115_loader.js","js/lib/diff.js"],
             "all_frames": true,
             "run_at": "document_start"
         }