diff --git a/hooks/useGame.ts b/hooks/useGame.ts
index f445285..5f0793b 100644
--- a/hooks/useGame.ts
+++ b/hooks/useGame.ts
@@ -618,12 +618,19 @@ export const useGame = () => {
   }, []);
 
   const uploadDocument = async (file: File, useOcr: boolean = false): Promise<ProcessedDocument> => {
+    if (!auth.user?.access_token) {
+      throw new Error('Authentication required to upload documents');
+    }
+    
     const formData = new FormData();
     formData.append('document', file);
     formData.append('useOcr', String(useOcr));
     
     const response = await fetch(`${BACKEND_URL}/api/upload`, {
       method: 'POST',
+      headers: {
+        'Authorization': `Bearer ${auth.user.access_token}`,
+      },
       body: formData
     });