diff --git a/api/funkwhale_api/audio/serializers.py b/api/funkwhale_api/audio/serializers.py
index 39378a816..2d3e6cafa 100644
--- a/api/funkwhale_api/audio/serializers.py
+++ b/api/funkwhale_api/audio/serializers.py
@@ -258,7 +258,8 @@ class ChannelSerializer(serializers.ModelSerializer):
             "downloads_count",
         ]
 
-    def get_artist(self, obj) -> object:
+    @extend_schema_field(OpenApiTypes.OBJECT)
+    def get_artist(self, obj):
         return music_serializers.serialize_artist_simple(obj.artist)
 
     def to_representation(self, obj):
diff --git a/api/funkwhale_api/common/serializers.py b/api/funkwhale_api/common/serializers.py
index 788a7eb65..7dcafa084 100644
--- a/api/funkwhale_api/common/serializers.py
+++ b/api/funkwhale_api/common/serializers.py
@@ -10,6 +10,9 @@ from django.core.files.uploadedfile import SimpleUploadedFile
 from django.utils.encoding import smart_text
 from django.utils.translation import ugettext_lazy as _
 
+from drf_spectacular.utils import extend_schema_field
+from drf_spectacular.types import OpenApiTypes
+
 from . import models
 from . import utils
 
@@ -270,7 +273,8 @@ class APIMutationSerializer(serializers.ModelSerializer):
             "previous_state",
         ]
 
-    def get_target(self, obj) -> object:
+    @extend_schema_field(OpenApiTypes.OBJECT)
+    def get_target(self, obj):
         target = obj.target
         if not target:
             return
@@ -292,7 +296,8 @@ class AttachmentSerializer(serializers.Serializer):
     file = StripExifImageField(write_only=True)
     urls = serializers.SerializerMethodField()
 
-    def get_urls(self, o) -> object:
+    @extend_schema_field(OpenApiTypes.OBJECT)
+    def get_urls(self, o):
         urls = {}
         urls["source"] = o.url
         urls["original"] = o.download_url_original
diff --git a/api/funkwhale_api/manage/serializers.py b/api/funkwhale_api/manage/serializers.py
index 76cc339d1..be14e950f 100644
--- a/api/funkwhale_api/manage/serializers.py
+++ b/api/funkwhale_api/manage/serializers.py
@@ -93,7 +93,8 @@ class ManageUserSerializer(serializers.ModelSerializer):
             )
         return instance
 
-    def get_actor(self, obj) -> object:
+    @extend_schema_field(OpenApiTypes.OBJECT)
+    def get_actor(self, obj):
         if obj.actor:
             return ManageBaseActorSerializer(obj.actor).data