diff --git a/DAL/studentDAL.py b/DAL/studentDAL.py
index 4d47216..0b41ca1 100644
--- a/DAL/studentDAL.py
+++ b/DAL/studentDAL.py
@@ -9,7 +9,7 @@ import csv
 class IStudentDAL(ABC):
 
     @abstractmethod
-    def get_by_id(self, id: str) -> Optional[[Student]]:
+    def get_by_id(self, id: str) -> Optional[Student]:
         pass
 
     @abstractmethod