diff --git a/api/mixins.py b/api/mixins.py
index c21b2be..3b015d7 100644
--- a/api/mixins.py
+++ b/api/mixins.py
@@ -44,3 +44,10 @@ def to_representation(self, instance):
         if url_field:
             data = {"url": url_field, **data}  # Add URL field at the top
         return data
+
+
+class RequiredFieldsMixin:
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        for field in self.fields.values():
+            field.required = True
diff --git a/gmn/serializers.py b/gmn/serializers.py
index 9caf3f8..69821aa 100644
--- a/gmn/serializers.py
+++ b/gmn/serializers.py
@@ -1,17 +1,19 @@
 from rest_framework import serializers
 
-from api.mixins import UrlFieldMixin
+from api.mixins import RequiredFieldsMixin, UrlFieldMixin
 
 from . import models as gmn_models
 
 
-class GMNSerializer(UrlFieldMixin, serializers.ModelSerializer):
+class GMNSerializer(UrlFieldMixin, RequiredFieldsMixin, serializers.ModelSerializer):
     class Meta:
         model = gmn_models.GMN
         fields = "__all__"
 
 
-class MeasuringpointSerializer(UrlFieldMixin, serializers.ModelSerializer):
+class MeasuringpointSerializer(
+    UrlFieldMixin, RequiredFieldsMixin, serializers.ModelSerializer
+):
     class Meta:
         model = gmn_models.Measuringpoint
         fields = "__all__"
diff --git a/gmw/serializers.py b/gmw/serializers.py
index 1e90ce7..a8004ac 100644
--- a/gmw/serializers.py
+++ b/gmw/serializers.py
@@ -1,17 +1,24 @@
 from rest_framework import serializers
 
-from api.mixins import UrlFieldMixin
+from api.mixins import RequiredFieldsMixin, UrlFieldMixin
 
 from . import models as gmw_models
 
 
-class GMWSerializer(UrlFieldMixin, serializers.ModelSerializer):
+class GMWSerializer(UrlFieldMixin, RequiredFieldsMixin, serializers.ModelSerializer):
     class Meta:
         model = gmw_models.GMW
         fields = "__all__"
 
 
-class MonitoringTubeSerializer(UrlFieldMixin, serializers.ModelSerializer):
+class MonitoringTubeSerializer(
+    UrlFieldMixin, RequiredFieldsMixin, serializers.ModelSerializer
+):
     class Meta:
         model = gmw_models.MonitoringTube
         fields = "__all__"
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        for field in self.fields.values():
+            field.required = True