diff --git a/apps/assets/api/asset.py b/apps/assets/api/asset.py
index 3f4b7a209..f8c2ab179 100644
--- a/apps/assets/api/asset.py
+++ b/apps/assets/api/asset.py
@@ -6,7 +6,7 @@ from django.shortcuts import get_object_or_404
 from django.db.models import Q
 
 from common.utils import get_logger, get_object_or_none
-from common.mixins.api import SuggestionMixin
+from common.mixins.api import SuggestionMixin, RenderToJsonMixin
 from users.models import User, UserGroup
 from users.serializers import UserSerializer, UserGroupSerializer
 from users.filters import UserFilter
@@ -88,7 +88,7 @@ class AssetPlatformRetrieveApi(RetrieveAPIView):
         return asset.platform
 
 
-class AssetPlatformViewSet(ModelViewSet):
+class AssetPlatformViewSet(ModelViewSet, RenderToJsonMixin):
     queryset = Platform.objects.all()
     serializer_class = serializers.PlatformSerializer
     filterset_fields = ['name', 'base']
diff --git a/apps/assets/serializers/asset.py b/apps/assets/serializers/asset.py
index 427d0e470..5211cfef6 100644
--- a/apps/assets/serializers/asset.py
+++ b/apps/assets/serializers/asset.py
@@ -189,6 +189,9 @@ class PlatformSerializer(serializers.ModelSerializer):
             'id', 'name', 'base', 'charset',
             'internal', 'meta', 'comment'
         ]
+        extra_kwargs = {
+            'internal': {'read_only': True},
+        }
 
 
 class AssetSimpleSerializer(serializers.ModelSerializer):