diff --git a/src/open_inwoner/openzaak/migrations/0006_auto_20230123_1619.py b/src/open_inwoner/openzaak/migrations/0006_auto_20230123_1619.py
new file mode 100644
index 0000000000..3006b7fbe8
--- /dev/null
+++ b/src/open_inwoner/openzaak/migrations/0006_auto_20230123_1619.py
@@ -0,0 +1,53 @@
+# Generated by Django 3.2.15 on 2023-01-23 15:19
+
+from django.db import migrations, models
+import django_better_admin_arrayfield.models.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("openzaak", "0005_openzaakconfig_zaak_max_confidentiality"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="openzaakconfig",
+            name="allowed_file_extensions",
+            field=django_better_admin_arrayfield.models.fields.ArrayField(
+                base_field=models.CharField(
+                    max_length=8, verbose_name="Allowed file extensions"
+                ),
+                default=[
+                    "pdf",
+                    "doc",
+                    "docx",
+                    "xls",
+                    "xlsx",
+                    "ppt",
+                    "pptx",
+                    "vsd",
+                    "png",
+                    "gif",
+                    "jpg",
+                    "tiff",
+                    "msg",
+                    "txt",
+                    "rtf",
+                    "jpeg",
+                    "bmp",
+                ],
+                help_text="A list of the allowed file extensions.",
+                size=None,
+            ),
+        ),
+        migrations.AddField(
+            model_name="openzaakconfig",
+            name="max_upload_size",
+            field=models.PositiveIntegerField(
+                default=50,
+                help_text="The max size of the file (in MB) which is uploaded.",
+                verbose_name="Max upload file size (in MB)",
+            ),
+        ),
+    ]
diff --git a/src/open_inwoner/openzaak/models.py b/src/open_inwoner/openzaak/models.py
index ee370434b7..3a672a8f04 100644
--- a/src/open_inwoner/openzaak/models.py
+++ b/src/open_inwoner/openzaak/models.py
@@ -1,6 +1,7 @@
 from django.db import models
 from django.utils.translation import gettext_lazy as _
 
+from django_better_admin_arrayfield.models.fields import ArrayField
 from solo.models import SingletonModel
 from zgw_consumers.api_models.constants import VertrouwelijkheidsAanduidingen
 from zgw_consumers.constants import APITypes
@@ -50,6 +51,37 @@ class OpenZaakConfig(SingletonModel):
         verbose_name=_("Documents confidentiality"),
         help_text=_("Select confidentiality level of documents to display for cases"),
     )
+    max_upload_size = models.PositiveIntegerField(
+        verbose_name=_("Max upload file size (in MB)"),
+        default=50,
+        help_text=_("The max size of the file (in MB) which is uploaded."),
+    )
+    allowed_file_extensions = ArrayField(
+        models.CharField(
+            verbose_name=_("Allowed file extensions"),
+            max_length=8,
+        ),
+        default=[
+            "pdf",
+            "doc",
+            "docx",
+            "xls",
+            "xlsx",
+            "ppt",
+            "pptx",
+            "vsd",
+            "png",
+            "gif",
+            "jpg",
+            "tiff",
+            "msg",
+            "txt",
+            "rtf",
+            "jpeg",
+            "bmp",
+        ],
+        help_text=_("A list of the allowed file extensions."),
+    )
 
     class Meta:
         verbose_name = _("Open Zaak configuration")