diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2a4a4f24b..468263ee8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -73,6 +73,7 @@ v2.4.5 (2018-10-02)
 
 ## Bug Fixes
 
+* [#2400](https://github.com/digitalocean/netbox/issues/2400) - API variable type mismatch at creating/modifying an entry
 * [#2406](https://github.com/digitalocean/netbox/issues/2406) - Remove hard-coded limit of 1000 objects from API-populated form fields
 * [#2414](https://github.com/digitalocean/netbox/issues/2414) - Tags field missing from device/VM component creation forms
 * [#2442](https://github.com/digitalocean/netbox/issues/2442) - Nullify "next" link in API when limit=0 is passed
diff --git a/netbox/netbox/settings.py b/netbox/netbox/settings.py
index f6fbcdf70..7034788fb 100644
--- a/netbox/netbox/settings.py
+++ b/netbox/netbox/settings.py
@@ -275,9 +275,12 @@ RQ_QUEUES = {
 
 # drf_yasg settings for Swagger
 SWAGGER_SETTINGS = {
+    'DEFAULT_AUTO_SCHEMA_CLASS': 'utilities.custom_inspectors.NetBoxSwaggerAutoSchema',
     'DEFAULT_FIELD_INSPECTORS': [
         'utilities.custom_inspectors.NullableBooleanFieldInspector',
         'utilities.custom_inspectors.CustomChoiceFieldInspector',
+        'utilities.custom_inspectors.TagListFieldInspector',
+        'utilities.custom_inspectors.SerializedPKRelatedFieldInspector',
         'drf_yasg.inspectors.CamelCaseJSONFilter',
         'drf_yasg.inspectors.ReferencingSerializerInspector',
         'drf_yasg.inspectors.RelatedFieldInspector',
diff --git a/netbox/utilities/custom_inspectors.py b/netbox/utilities/custom_inspectors.py
index ca6e08fc1..5975788bc 100644
--- a/netbox/utilities/custom_inspectors.py
+++ b/netbox/utilities/custom_inspectors.py
@@ -1,9 +1,52 @@
 from drf_yasg import openapi
-from drf_yasg.inspectors import FieldInspector, NotHandled, PaginatorInspector, FilterInspector
+from drf_yasg.inspectors import FieldInspector, NotHandled, PaginatorInspector, FilterInspector, SwaggerAutoSchema
 from rest_framework.fields import ChoiceField
+from rest_framework.relations import ManyRelatedField
+from taggit_serializer.serializers import TagListSerializerField
 
 from extras.api.customfields import CustomFieldsSerializer
-from utilities.api import ChoiceField
+from utilities.api import ChoiceField, SerializedPKRelatedField, WritableNestedSerializer
+
+
+class NetBoxSwaggerAutoSchema(SwaggerAutoSchema):
+    def get_request_serializer(self):
+        serializer = super().get_request_serializer()
+
+        if serializer is not None and self.method in self.implicit_body_methods:
+            properties = {}
+            for child_name, child in serializer.fields.items():
+                if isinstance(child, (ChoiceField, WritableNestedSerializer)):
+                    properties[child_name] = None
+                elif isinstance(child, ManyRelatedField) and isinstance(child.child_relation, SerializedPKRelatedField):
+                    properties[child_name] = None
+
+            if properties:
+                writable_class = type('Writable' + type(serializer).__name__, (type(serializer),), properties)
+                serializer = writable_class()
+
+        return serializer
+
+
+class SerializedPKRelatedFieldInspector(FieldInspector):
+    def field_to_swagger_object(self, field, swagger_object_type, use_references, **kwargs):
+        SwaggerType, ChildSwaggerType = self._get_partial_types(field, swagger_object_type, use_references, **kwargs)
+        if isinstance(field, SerializedPKRelatedField):
+            return self.probe_field_inspectors(field.serializer(), ChildSwaggerType, use_references)
+
+        return NotHandled
+
+
+class TagListFieldInspector(FieldInspector):
+    def field_to_swagger_object(self, field, swagger_object_type, use_references, **kwargs):
+        SwaggerType, ChildSwaggerType = self._get_partial_types(field, swagger_object_type, use_references, **kwargs)
+        if isinstance(field, TagListSerializerField):
+            child_schema = self.probe_field_inspectors(field.child, ChildSwaggerType, use_references)
+            return SwaggerType(
+                type=openapi.TYPE_ARRAY,
+                items=child_schema,
+            )
+
+        return NotHandled
 
 
 class CustomChoiceFieldInspector(FieldInspector):