diff --git a/index.php b/index.php
index 8e1cc86..0be5f6f 100644
--- a/index.php
+++ b/index.php
@@ -62,21 +62,29 @@ header('Expires: 0');
 
 <div id="toast-container"></div>
 
+<script>
+// PDF.js Worker SOFORT vor dem Laden konfigurieren
+var pdfWorkerSrc = 'lib/pdf.worker.min.js?v=<?php echo $jsVersion; ?>';
+if (typeof window !== 'undefined' && typeof window.pdfjsWorker === 'undefined') {
+    window.pdfjsWorkerSrc = pdfWorkerSrc;
+}
+</script>
 <script src="lib/pdf.min.js?v=<?php echo $jsVersion; ?>"></script>
+<script>
+// PDF.js Worker setzen NACHDEM pdf.min.js geladen wurde
+if (typeof pdfjs !== 'undefined') {
+    pdfjs.GlobalWorkerOptions.workerSrc = 'lib/pdf.worker.min.js?v=<?php echo $jsVersion; ?>';
+    console.log('[PDF.js] Worker konfiguriert:', pdfjs.GlobalWorkerOptions.workerSrc);
+} else {
+    console.warn('[PDF.js] NICHT verfügbar!');
+}
+</script>
 <script src="lib/idb.js?v=<?php echo $jsVersion; ?>"></script>
 <script src="lib/api.js?v=<?php echo $jsVersion; ?>"></script>
 <script src="lib/offline.js?v=<?php echo $jsVersion; ?>"></script>
 <script src="lib/router.js?v=<?php echo $jsVersion; ?>"></script>
 <script src="app.js?v=<?php echo $jsVersion; ?>"></script>
 <script>
-if (typeof pdfjsWorker === 'undefined') {
-    // Setze PDF.js Worker-Pfad
-    if (typeof pdfjs !== 'undefined') {
-        pdfjs.GlobalWorkerOptions.workerSrc = 'lib/pdf.worker.min.js?v=<?php echo $jsVersion; ?>';
-    }
-}
-</script>
-<script>
 /* PWA Install Prompt abfangen */
 let deferredInstallPrompt = null;
 window.addEventListener('beforeinstallprompt', function (e) {