diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 72ba6c35..cffece7d 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -124,6 +124,7 @@ Removed
     - Project starring timeline event creation (#1294)
     - ``user_email_additional`` app setting (#874)
     - ``get_visible_projects()`` template tag (#1432)
+    - App setting value max length limit (#1443)
 
 
 v0.13.4 (2024-02-16)
diff --git a/docs/source/major_changes.rst b/docs/source/major_changes.rst
index 82682489..d6a10bb6 100644
--- a/docs/source/major_changes.rst
+++ b/docs/source/major_changes.rst
@@ -37,6 +37,7 @@ Release Highlights
 - Plugin API return data updates and deprecations
 - Rename timeline app models
 - Rename base test classes
+- Remove app setting max length limit
 - Remove Python v3.8 support
 - Remove SAML SSO support
 
diff --git a/projectroles/forms.py b/projectroles/forms.py
index 89ad8666..deecc474 100644
--- a/projectroles/forms.py
+++ b/projectroles/forms.py
@@ -24,7 +24,6 @@
     RemoteProject,
     SODAR_CONSTANTS,
     ROLE_RANKING,
-    APP_SETTING_VAL_MAXLENGTH,
     CAT_DELIMITER,
     CAT_DELIMITER_ERROR_MSG,
 )
@@ -474,7 +473,6 @@ def _set_app_setting_field(self, plugin_name, s_field, s_key, s_val):
                     )
             elif s_val['type'] == 'STRING':
                 self.fields[s_field] = forms.CharField(
-                    max_length=APP_SETTING_VAL_MAXLENGTH,
                     widget=forms.TextInput(attrs=s_widget_attrs),
                     **setting_kwargs
                 )
diff --git a/projectroles/migrations/0032_alter_appsetting_value.py b/projectroles/migrations/0032_alter_appsetting_value.py
new file mode 100644
index 00000000..455396cb
--- /dev/null
+++ b/projectroles/migrations/0032_alter_appsetting_value.py
@@ -0,0 +1,20 @@
+# Generated by Django 4.2.13 on 2024-06-20 14:31
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("projectroles", "0031_remotesite_owner_modifiable"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="appsetting",
+            name="value",
+            field=models.CharField(
+                blank=True, help_text="Value of the setting", null=True
+            ),
+        ),
+    ]
diff --git a/projectroles/models.py b/projectroles/models.py
index 268842a2..1d7cd1ca 100644
--- a/projectroles/models.py
+++ b/projectroles/models.py
@@ -51,7 +51,6 @@
     ('STRING', 'String'),
     ('JSON', 'Json'),
 ]
-APP_SETTING_VAL_MAXLENGTH = 255
 PROJECT_SEARCH_TYPES = ['project']
 PROJECT_TAG_STARRED = 'STARRED'
 CAT_DELIMITER = ' / '
@@ -935,7 +934,6 @@ class AppSetting(models.Model):
 
     #: Value of the setting
     value = models.CharField(
-        max_length=APP_SETTING_VAL_MAXLENGTH,
         unique=False,
         null=True,
         blank=True,
diff --git a/userprofile/forms.py b/userprofile/forms.py
index 41ec6013..845fbf3c 100644
--- a/userprofile/forms.py
+++ b/userprofile/forms.py
@@ -15,7 +15,6 @@
 from projectroles.models import (
     SODARUserAdditionalEmail,
     SODAR_CONSTANTS,
-    APP_SETTING_VAL_MAXLENGTH,
     ADD_EMAIL_ALREADY_SET_MSG,
 )
 from projectroles.plugins import get_active_plugins
@@ -97,7 +96,6 @@ def __init__(self, *args, **kwargs):
                         )
                     else:
                         self.fields[s_field] = forms.CharField(
-                            max_length=APP_SETTING_VAL_MAXLENGTH,
                             widget=forms.TextInput(attrs=s_widget_attrs),
                             **setting_kwargs,
                         )