diff --git a/InvenTree/part/migrations/0046_auto_20200804_0107.py b/InvenTree/part/migrations/0046_auto_20200804_0107.py
new file mode 100644
index 0000000000..5a0952c1e4
--- /dev/null
+++ b/InvenTree/part/migrations/0046_auto_20200804_0107.py
@@ -0,0 +1,18 @@
+# Generated by Django 3.0.7 on 2020-08-04 01:07
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('part', '0045_auto_20200605_0932'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='partcategory',
+            name='default_keywords',
+            field=models.CharField(blank=True, help_text='Default keywords for parts in this category', max_length=250, null=True),
+        ),
+    ]
diff --git a/InvenTree/part/models.py b/InvenTree/part/models.py
index 550645cb68..01768b4bb3 100644
--- a/InvenTree/part/models.py
+++ b/InvenTree/part/models.py
@@ -65,7 +65,7 @@ class PartCategory(InvenTreeTree):
         help_text=_('Default location for parts in this category')
     )
 
-    default_keywords = models.CharField(blank=True, max_length=250, help_text=_('Default keywords for parts in this category'))
+    default_keywords = models.CharField(null=True, blank=True, max_length=250, help_text=_('Default keywords for parts in this category'))
 
     def get_absolute_url(self):
         return reverse('category-detail', kwargs={'pk': self.id})