diff --git a/edupage_api/classes.py b/edupage_api/classes.py
index a1e991d..6dbe718 100644
--- a/edupage_api/classes.py
+++ b/edupage_api/classes.py
@@ -59,7 +59,7 @@ def get_classes(self) -> Optional[list]:
     def get_class(self, class_id: int | str) -> Optional[Class]:
         try:
             class_id = int(class_id)
-        except ValueError:
+        except (ValueError, TypeError):
             return None
 
         return next(
diff --git a/edupage_api/classrooms.py b/edupage_api/classrooms.py
index 37a5d58..33f591e 100644
--- a/edupage_api/classrooms.py
+++ b/edupage_api/classrooms.py
@@ -39,7 +39,7 @@ def get_classrooms(self) -> Optional[list]:
     def get_classroom(self, classroom_id: int | str) -> Optional[Classroom]:
         try:
             classroom_id = int(classroom_id)
-        except ValueError:
+        except (ValueError, TypeError):
             return None
 
         return next(
diff --git a/edupage_api/people.py b/edupage_api/people.py
index f119981..00b8497 100644
--- a/edupage_api/people.py
+++ b/edupage_api/people.py
@@ -218,7 +218,7 @@ def get_all_students(self) -> Optional[list[EduStudent]]:
     def get_teacher(self, teacher_id: int | str) -> Optional[EduTeacher]:
         try:
             teacher_id = int(teacher_id)
-        except ValueError:
+        except (ValueError, TypeError):
             return None
 
         return next(
@@ -234,7 +234,7 @@ def get_teacher(self, teacher_id: int | str) -> Optional[EduTeacher]:
     def get_student(self, student_id: int | str) -> Optional[EduStudent]:
         try:
             student_id = int(student_id)
-        except ValueError:
+        except (ValueError, TypeError):
             return None
 
         return next(
diff --git a/edupage_api/subjects.py b/edupage_api/subjects.py
index 34e3861..0c14516 100644
--- a/edupage_api/subjects.py
+++ b/edupage_api/subjects.py
@@ -39,7 +39,7 @@ def get_subjects(self) -> Optional[list]:
     def get_subject(self, subject_id: int | str) -> Optional[Subject]:
         try:
             subject_id = int(subject_id)
-        except ValueError:
+        except (ValueError, TypeError):
             return None
 
         return next(