diff --git a/backend/server.js b/backend/server.js
index 3201ea5..a7c96ad 100644
--- a/backend/server.js
+++ b/backend/server.js
@@ -23,6 +23,13 @@ app.use(cors())
 app.use(express.json())
 app.use(express.static('public'))
 
+// Middleware de logging pour debug
+app.use((req, res, next) => {
+  console.log(`[DEBUG] ${new Date().toISOString()} - ${req.method} ${req.url}`)
+  console.log(`[DEBUG] Headers:`, req.headers)
+  next()
+})
+
 // Fonction pour calculer le hash d'un fichier
 function calculateFileHash(buffer) {
   return crypto.createHash('sha256').update(buffer).digest('hex')