diff --git a/b0esche_cloud/lib/pages/document_viewer.dart b/b0esche_cloud/lib/pages/document_viewer.dart
index bdbd58d..2e35ec5 100644
--- a/b0esche_cloud/lib/pages/document_viewer.dart
+++ b/b0esche_cloud/lib/pages/document_viewer.dart
@@ -4,6 +4,8 @@ import 'package:flutter_bloc/flutter_bloc.dart';
 import '../blocs/document_viewer/document_viewer_bloc.dart';
 import '../blocs/document_viewer/document_viewer_event.dart';
 import '../blocs/document_viewer/document_viewer_state.dart';
+import '../blocs/session/session_bloc.dart';
+import '../blocs/session/session_state.dart';
 import '../services/file_service.dart';
 import '../injection.dart';
 import 'package:syncfusion_flutter_pdfviewer/pdfviewer.dart';
@@ -167,7 +169,20 @@ class _DocumentViewerModalState extends State<DocumentViewerModal> {
                 }
                 if (state is DocumentViewerReady) {
                   if (state.caps.isPdf) {
-                    return SfPdfViewer.network(state.viewUrl.toString());
+                    return BlocBuilder<SessionBloc, SessionState>(
+                      builder: (context, sessionState) {
+                        String? token;
+                        if (sessionState is SessionActive) {
+                          token = sessionState.token;
+                        }
+                        return SfPdfViewer.network(
+                          state.viewUrl.toString(),
+                          headers: token != null
+                              ? {'Authorization': 'Bearer $token'}
+                              : {},
+                        );
+                      },
+                    );
                   } else {
                     return Container(
                       color: AppTheme.secondaryText,
@@ -318,8 +333,20 @@ class _DocumentViewerState extends State<DocumentViewer> {
             }
             if (state is DocumentViewerReady) {
               if (state.caps.isPdf) {
-                // Use PDF viewer
-                return SfPdfViewer.network(state.viewUrl.toString());
+                return BlocBuilder<SessionBloc, SessionState>(
+                  builder: (context, sessionState) {
+                    String? token;
+                    if (sessionState is SessionActive) {
+                      token = sessionState.token;
+                    }
+                    return SfPdfViewer.network(
+                      state.viewUrl.toString(),
+                      headers: token != null
+                          ? {'Authorization': 'Bearer $token'}
+                          : {},
+                    );
+                  },
+                );
               } else {
                 // Placeholder for office docs iframe
                 return Container(