diff --git a/CHANGELOG.md b/CHANGELOG.md
index db5120ead..8105e0006 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,8 @@ v2.4.5 (FUTURE)
 ## Bug Fixes
 
 * [#2406](https://github.com/digitalocean/netbox/issues/2406) - Remove hard-coded limit of 1000 objects from API-populated form fields
+* [#2443](https://github.com/digitalocean/netbox/issues/2443) - Enforce JSON object format when creating config contexts
+* [#2444](https://github.com/digitalocean/netbox/issues/2444) - Improve validation of interface MAC addresses
 
 ---
 
diff --git a/netbox/dcim/fields.py b/netbox/dcim/fields.py
index 22e0be581..4f38ec24e 100644
--- a/netbox/dcim/fields.py
+++ b/netbox/dcim/fields.py
@@ -1,13 +1,11 @@
 from __future__ import unicode_literals
 
-from netaddr import EUI, mac_unix_expanded
+from netaddr import AddrFormatError, EUI, mac_unix_expanded
 
 from django.core.exceptions import ValidationError
 from django.core.validators import MinValueValidator, MaxValueValidator
 from django.db import models
 
-from .formfields import MACAddressFormField
-
 
 class ASNField(models.BigIntegerField):
     description = "32-bit ASN field"
@@ -35,7 +33,7 @@ class MACAddressField(models.Field):
             return value
         try:
             return EUI(value, version=48, dialect=mac_unix_expanded_uppercase)
-        except ValueError as e:
+        except AddrFormatError as e:
             raise ValidationError(e)
 
     def db_type(self, connection):
@@ -45,11 +43,3 @@ class MACAddressField(models.Field):
         if not value:
             return None
         return str(self.to_python(value))
-
-    def form_class(self):
-        return MACAddressFormField
-
-    def formfield(self, **kwargs):
-        defaults = {'form_class': self.form_class()}
-        defaults.update(kwargs)
-        return super(MACAddressField, self).formfield(**defaults)
diff --git a/netbox/dcim/formfields.py b/netbox/dcim/formfields.py
deleted file mode 100644
index 804c2c956..000000000
--- a/netbox/dcim/formfields.py
+++ /dev/null
@@ -1,27 +0,0 @@
-from __future__ import unicode_literals
-
-from django import forms
-from django.core.exceptions import ValidationError
-from netaddr import EUI, AddrFormatError
-
-
-#
-# Form fields
-#
-
-class MACAddressFormField(forms.Field):
-    default_error_messages = {
-        'invalid': "Enter a valid MAC address.",
-    }
-
-    def to_python(self, value):
-        if not value:
-            return None
-
-        if isinstance(value, EUI):
-            return value
-
-        try:
-            return EUI(value, version=48)
-        except AddrFormatError:
-            raise ValidationError("Please specify a valid MAC address.")
diff --git a/netbox/dcim/forms.py b/netbox/dcim/forms.py
index 333e90548..cec2fafad 100644
--- a/netbox/dcim/forms.py
+++ b/netbox/dcim/forms.py
@@ -27,7 +27,6 @@ from .constants import (
     RACK_TYPE_CHOICES, RACK_WIDTH_CHOICES, RACK_WIDTH_19IN, RACK_WIDTH_23IN, SITE_STATUS_CHOICES, SUBDEVICE_ROLE_CHILD,
     SUBDEVICE_ROLE_PARENT, SUBDEVICE_ROLE_CHOICES,
 )
-from .formfields import MACAddressFormField
 from .models import (
     DeviceBay, DeviceBayTemplate, ConsolePort, ConsolePortTemplate, ConsoleServerPort, ConsoleServerPortTemplate,
     Device, DeviceRole, DeviceType, Interface, InterfaceConnection, InterfaceTemplate, Manufacturer, InventoryItem,
@@ -1857,7 +1856,7 @@ class InterfaceCreateForm(ComponentForm, forms.Form):
     enabled = forms.BooleanField(required=False)
     lag = forms.ModelChoiceField(queryset=Interface.objects.all(), required=False, label='Parent LAG')
     mtu = forms.IntegerField(required=False, min_value=1, max_value=32767, label='MTU')
-    mac_address = MACAddressFormField(required=False, label='MAC Address')
+    mac_address = forms.CharField(required=False, label='MAC Address')
     mgmt_only = forms.BooleanField(
         required=False,
         label='OOB Management',
diff --git a/netbox/extras/models.py b/netbox/extras/models.py
index 2ccb7cdf1..de3edca9b 100644
--- a/netbox/extras/models.py
+++ b/netbox/extras/models.py
@@ -700,6 +700,14 @@ class ConfigContext(models.Model):
     def get_absolute_url(self):
         return reverse('extras:configcontext', kwargs={'pk': self.pk})
 
+    def clean(self):
+
+        # Verify that JSON data is provided as an object
+        if type(self.data) is not dict:
+            raise ValidationError(
+                {'data': 'JSON data must be in object form. Example: {"foo": 123}'}
+            )
+
 
 class ConfigContextModel(models.Model):
 
diff --git a/netbox/virtualization/forms.py b/netbox/virtualization/forms.py
index 9853157d8..ee1007be3 100644
--- a/netbox/virtualization/forms.py
+++ b/netbox/virtualization/forms.py
@@ -8,7 +8,6 @@ from taggit.forms import TagField
 
 from dcim.constants import IFACE_FF_VIRTUAL, IFACE_MODE_ACCESS, IFACE_MODE_TAGGED_ALL
 from dcim.forms import INTERFACE_MODE_HELP_TEXT
-from dcim.formfields import MACAddressFormField
 from dcim.models import Device, DeviceRole, Interface, Platform, Rack, Region, Site
 from extras.forms import AddRemoveTagsForm, CustomFieldBulkEditForm, CustomFieldForm, CustomFieldFilterForm
 from ipam.models import IPAddress
@@ -461,7 +460,7 @@ class InterfaceCreateForm(ComponentForm):
     form_factor = forms.ChoiceField(choices=VIFACE_FF_CHOICES, initial=IFACE_FF_VIRTUAL, widget=forms.HiddenInput())
     enabled = forms.BooleanField(required=False)
     mtu = forms.IntegerField(required=False, min_value=1, max_value=32767, label='MTU')
-    mac_address = MACAddressFormField(required=False, label='MAC Address')
+    mac_address = forms.CharField(required=False, label='MAC Address')
     description = forms.CharField(max_length=100, required=False)
 
     def __init__(self, *args, **kwargs):