diff --git a/authentik/core/types.py b/authentik/core/types.py
index 988a9aea6..3901350a3 100644
--- a/authentik/core/types.py
+++ b/authentik/core/types.py
@@ -1,8 +1,8 @@
 """authentik core dataclasses"""
 from dataclasses import dataclass
-from typing import Optional
+from typing import Any, Optional
 
-from rest_framework.fields import CharField
+from rest_framework.fields import CharField, DictField
 
 from authentik.core.api.utils import PassiveSerializer
 
@@ -20,6 +20,9 @@ class UILoginButton:
     # Icon URL, used as-is
     icon_url: Optional[str] = None
 
+    # Additional data, optional
+    additional_data: Any = None
+
 
 class UILoginButtonSerializer(PassiveSerializer):
     """Serializer for Login buttons of sources"""
@@ -27,6 +30,7 @@ class UILoginButtonSerializer(PassiveSerializer):
     name = CharField()
     url = CharField()
     icon_url = CharField(required=False, allow_null=True)
+    additional_data = DictField(required=False, allow_null=True)
 
 
 class UserSettingSerializer(PassiveSerializer):
diff --git a/authentik/stages/identification/tests.py b/authentik/stages/identification/tests.py
index 1c8fe74ac..bb99ee947 100644
--- a/authentik/stages/identification/tests.py
+++ b/authentik/stages/identification/tests.py
@@ -115,6 +115,7 @@ class TestIdentificationStage(TestCase):
                 "title": self.flow.title,
                 "sources": [
                     {
+                        "additional_data": None,
                         "icon_url": "/static/authentik/sources/.svg",
                         "name": "test",
                         "url": "/source/oauth/login/test/",
@@ -158,6 +159,7 @@ class TestIdentificationStage(TestCase):
                 "title": self.flow.title,
                 "sources": [
                     {
+                        "additional_data": None,
                         "icon_url": "/static/authentik/sources/.svg",
                         "name": "test",
                         "url": "/source/oauth/login/test/",