diff --git a/dislocker_auth.py b/dislocker_auth.py
index b2f10ba..a3f227a 100644
--- a/dislocker_auth.py
+++ b/dislocker_auth.py
@@ -205,7 +205,7 @@ auth = Auth(server_config["db"]["host"], server_config["db"]["db_name"], server_
 def register():
     pc_number = int(request.json.get('pc_number'))
     pc_uuid = str(request.json.get('pc_uuid'))
-    onetime_password = int(request.json.get('onetime'))
+    onetime_password = str(request.json.get('onetime'))
 
     if os.path.isfile(onetime_config_path):
         with open(onetime_config_path, "r") as r: