diff --git a/chat/migrations/0001_initial.py b/chat/migrations/0001_initial.py
index 75f8f15..294bd7e 100644
--- a/chat/migrations/0001_initial.py
+++ b/chat/migrations/0001_initial.py
@@ -1,4 +1,4 @@
-# Generated by Django 5.0.3 on 2024-04-27 06:48
+# Generated by Django 5.0.3 on 2024-04-27 07:00
 
 import django.db.models.deletion
 from django.conf import settings
@@ -30,7 +30,7 @@ class Migration(migrations.Migration):
                 ("name", models.CharField(max_length=255, verbose_name="name")),
                 (
                     "read_access",
-                    models.PositiveSmallIntegerField(
+                    models.CharField(
                         choices=[
                             ("anonymous", "Everyone, including anonymous users"),
                             ("authenticated", "Authenticated users"),
@@ -53,12 +53,13 @@ class Migration(migrations.Migration):
                             ),
                             ("admin", "Admin users"),
                         ],
+                        max_length=16,
                         verbose_name="read permission",
                     ),
                 ),
                 (
                     "write_access",
-                    models.PositiveSmallIntegerField(
+                    models.CharField(
                         choices=[
                             ("anonymous", "Everyone, including anonymous users"),
                             ("authenticated", "Authenticated users"),
@@ -81,6 +82,7 @@ class Migration(migrations.Migration):
                             ),
                             ("admin", "Admin users"),
                         ],
+                        max_length=16,
                         verbose_name="write permission",
                     ),
                 ),
diff --git a/chat/models.py b/chat/models.py
index b5a35e7..66e0f93 100644
--- a/chat/models.py
+++ b/chat/models.py
@@ -13,12 +13,14 @@ class Channel(models.Model):
         verbose_name=_("name"),
     )
 
-    read_access = models.PositiveSmallIntegerField(
+    read_access = models.CharField(
+        max_length=16,
         verbose_name=_("read permission"),
         choices=PermissionType,
     )
 
-    write_access = models.PositiveSmallIntegerField(
+    write_access = models.CharField(
+        max_length=16,
         verbose_name=_("write permission"),
         choices=PermissionType,
     )