diff --git a/cntmanage/flightslot/models/students.py b/cntmanage/flightslot/models/students.py
index e913747..b4014ce 100644
--- a/cntmanage/flightslot/models/students.py
+++ b/cntmanage/flightslot/models/students.py
@@ -46,8 +46,8 @@ class Student(models.Model):
         blank=True
     )
 
-    def default_password(self) -> str:
-        return f"{self.name.lower()[0]}{self.surname.lower()}{self.id}"
+    def default_password(self) -> str:  # Maximum 4 digits for passowrd
+        return f"{self.name.lower()[0]}{self.surname.lower()}{self.id % 10000}"
     
     def default_username(self) -> str:
         if self.pk and self.user: