diff --git a/src/App.tsx b/src/App.tsx
index a9e253e..173cd12 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -27,9 +27,9 @@ export default function App() {
       try {
         setIsLoadingDefault(true);
         setDefaultLoadError(null);
-        // Using corsproxy.io to avoid Dropbox CORS issues
+        // Using allorigins proxy to avoid Dropbox CORS issues and improve reliability
         const dropboxUrl = 'https://dl.dropboxusercontent.com/scl/fi/nkyabkq2jdwfudof2ovrl/Data-Matrix.xlsx?rlkey=1cz5fuabwipqqivihii7sybw0&st=io0g4wvb&dl=1';
-        const proxyUrl = `https://corsproxy.io/?${encodeURIComponent(dropboxUrl)}`;
+        const proxyUrl = `https://api.allorigins.win/raw?url=${encodeURIComponent(dropboxUrl)}`;
         
         const response = await fetch(proxyUrl);
         if (!response.ok) {