diff --git a/views/history/history_detail.html b/views/history/history_detail.html
index 0ae78c6..1409b6d 100644
--- a/views/history/history_detail.html
+++ b/views/history/history_detail.html
@@ -852,12 +852,13 @@
     <script src="https://registry.npmmirror.com/html2canvas/1.4.1/files/dist/html2canvas.min.js"></script>
     <script src="https://registry.npmmirror.com/jspdf/2.5.1/files/dist/jspdf.umd.min.js"></script>
 
-    <!-- PDF.js for structured translation PDF comparison -->
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.min.js"></script>
+    <!-- PDF.js for structured translation PDF comparison (本地版本) -->
+    <script src="../../public/pdfjs/build/pdf.js"></script>
     <script>
       if (typeof pdfjsLib !== "undefined") {
-        pdfjsLib.GlobalWorkerOptions.workerSrc =
-          "https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.worker.min.js";
+        // 使用绝对路径确保 Worker 可以正确加载
+        const baseUrl = window.location.origin + window.location.pathname.split('/views/')[0];
+        pdfjsLib.GlobalWorkerOptions.workerSrc = baseUrl + "/public/pdfjs/build/pdf.worker.js";
       }
     </script>