diff --git a/netbox/extras/models/customfields.py b/netbox/extras/models/customfields.py
index 283960368..29ecfd028 100644
--- a/netbox/extras/models/customfields.py
+++ b/netbox/extras/models/customfields.py
@@ -322,6 +322,8 @@ class CustomField(CloningMixin, ExportTemplatesMixin, WebhooksMixin, ChangeLogge
                 initial=initial,
                 max_digits=12,
                 decimal_places=4,
+                min_value=self.validation_minimum,
+                max_value=self.validation_maximum
             )
 
         # Boolean
@@ -496,13 +498,11 @@ class CustomField(CloningMixin, ExportTemplatesMixin, WebhooksMixin, ChangeLogge
 
             # Validate decimal
             elif self.type == CustomFieldTypeChoices.TYPE_DECIMAL:
-                if type(value) is not decimal.Decimal and type(value) is not str:
+                if type(value) is not decimal.Decimal:
                     raise ValidationError("Value must be a decimal.")
-
-                converted = decimal.Decimal(value)
-                if self.validation_minimum is not None and converted < self.validation_minimum:
+                if self.validation_minimum is not None and value < self.validation_minimum:
                     raise ValidationError(f"Value must be at least {self.validation_minimum}")
-                if self.validation_maximum is not None and converted > self.validation_maximum:
+                if self.validation_maximum is not None and value > self.validation_maximum:
                     raise ValidationError(f"Value must not exceed {self.validation_maximum}")
 
             # Validate boolean
diff --git a/netbox/utilities/filters.py b/netbox/utilities/filters.py
index 0c0c4bd05..087dc99d7 100644
--- a/netbox/utilities/filters.py
+++ b/netbox/utilities/filters.py
@@ -3,8 +3,6 @@ from django import forms
 from django.conf import settings
 from django_filters.constants import EMPTY_VALUES
 
-from utilities.forms import MACAddressField
-
 
 def multivalue_field_factory(field_class):
     """
@@ -23,14 +21,6 @@ def multivalue_field_factory(field_class):
                 field.to_python(v) for v in value if v
             ]
 
-        def run_validators(self, value):
-            for v in value:
-                super().run_validators(v)
-
-        def validate(self, value):
-            for v in value:
-                super().validate(v)
-
     return type(f'MultiValue{field_class.__name__}', (NewField,), dict())