diff --git a/backend/domain/validation/SubjectValidator.py b/backend/domain/validation/SubjectValidator.py
deleted file mode 100644
index 88b2a892..00000000
--- a/backend/domain/validation/SubjectValidator.py
+++ /dev/null
@@ -1,21 +0,0 @@
-from domain.validation.ValidationResult import ValidationError, ValidationResult, ValidationSuccess
-
-
-class SubjectValidator:
-    @staticmethod
-    def validate(json_data: dict) -> ValidationResult:
-
-        name = json_data.get("name")
-        teacher_id = json_data.get("teacher_id")
-
-        errors: list[str] = []
-        if not name:
-            errors.append("Veld 'name' ontbreekt.")
-
-        if not teacher_id:
-            errors.append("Veld 'teacher_id' ontbreekt.")
-
-        if len(errors) > 0:
-            return ValidationError(errors)
-
-        return ValidationSuccess()
diff --git a/backend/domain/validation/TeacherValidator.py b/backend/domain/validation/TeacherValidator.py
deleted file mode 100644
index 0f57aa15..00000000
--- a/backend/domain/validation/TeacherValidator.py
+++ /dev/null
@@ -1,18 +0,0 @@
-from domain.validation.ValidationResult import ValidationError, ValidationResult, ValidationSuccess
-
-
-# deze klassen zijn niet meer nodig omdat we gebruik maken van pydantic en FastAPI
-class TeacherValidator:
-    @staticmethod
-    def validate(json_data: dict) -> ValidationResult:
-
-        name = json_data.get("name")
-
-        errors: list[str] = []
-        if not name:
-            errors.append("Veld 'name' ontbreekt.")
-
-        if len(errors) > 0:
-            return ValidationError(errors)
-
-        return ValidationSuccess()
diff --git a/backend/domain/validation/ValidationResult.py b/backend/domain/validation/ValidationResult.py
deleted file mode 100644
index 3ffe7142..00000000
--- a/backend/domain/validation/ValidationResult.py
+++ /dev/null
@@ -1,24 +0,0 @@
-from abc import ABC, abstractmethod
-
-
-class ValidationResult(ABC):
-
-    errors: list[str]
-
-    @abstractmethod
-    def __bool__(self) -> bool:
-        raise NotImplementedError
-
-
-class ValidationSuccess(ValidationResult):
-
-    def __bool__(self) -> bool:
-        return True
-
-
-class ValidationError(ValidationResult):
-    def __init__(self, errors: list[str]) -> None:
-        self.errors = errors
-
-    def __bool__(self) -> bool:
-        return False
diff --git a/backend/requirements.txt b/backend/requirements.txt
index 679534f5..dbd63a55 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -1,6 +1,8 @@
 annotated-types==0.6.0
 anyio==4.3.0
 click==8.1.7
+dnspython==2.6.1
+email_validator==2.1.1
 fastapi==0.110.0
 greenlet==3.0.3
 h11==0.14.0