diff --git a/utils/utils.py b/utils/utils.py
index 13bc9f1..c3c4a01 100644
--- a/utils/utils.py
+++ b/utils/utils.py
@@ -17,6 +17,11 @@ class LoginInfo():
         with open(config_path, mode="rb") as f:
             config = tomllib.load(f)
 
+        required_fields = ["lang", "login_ID", "login_passwd", "company_ID"]
+        for field in required_fields:
+            if field not in config.get("login_info", {}):
+                raise ValueError(f"Missing required field: {field} in login_info section")
+
         self.lang = config["login_info"]["lang"]
         self.login_ID = config["login_info"]["login_ID"]
         self.login_passwd = config["login_info"]["login_passwd"]