diff --git a/server.py b/server.py
index a1e8401..f45cb6a 100644
--- a/server.py
+++ b/server.py
@@ -142,7 +142,7 @@ def copyBadge(uid):
                     time.sleep(2)
                     if status_code == 0:  # Si on a réussi à avoir le dump
                         stdout, stderr, status_code = runCommand(
-                            'nfc-mfclassic W a %s/%s.dmp %s/new.dmp' % (DUMPS_DIR, uid, DUMPS_DIR))
+                            'nfc-mfclassic W ab u %s/%s.dmp %s/new.dmp' % (DUMPS_DIR, uid, DUMPS_DIR))
                         time.sleep(2)
                         if status_code == 0:  # Si on a réussi à copier
                             result = {'status': 'OK', 'message': 'Badge copié !'}