diff --git a/lib/rucio/client/didclient.py b/lib/rucio/client/didclient.py
index 5e463e1ef6..51a99c139c 100644
--- a/lib/rucio/client/didclient.py
+++ b/lib/rucio/client/didclient.py
@@ -21,7 +21,7 @@
 
 from rucio.client.baseclient import BaseClient, choice
 from rucio.common.exception import DeprecationError
-from rucio.common.utils import build_url, date_to_str, render_json, render_json_list
+from rucio.common.utils import build_url, date_to_str, render_json
 
 
 class DIDClient(BaseClient):
@@ -121,7 +121,7 @@ def add_dids(self, dids):
         """
         path = '/'.join([self.DIDS_BASEURL])
         url = build_url(choice(self.list_hosts), path=path)
-        r = self._send_request(url, type_='POST', data=render_json_list(dids))
+        r = self._send_request(url, type_='POST', data=render_json(dids))
         if r.status_code == codes.created:
             return True
         else:
diff --git a/lib/rucio/web/rest/flaskapi/v1/replicas.py b/lib/rucio/web/rest/flaskapi/v1/replicas.py
index 146d3db4bf..fcbc9fa679 100644
--- a/lib/rucio/web/rest/flaskapi/v1/replicas.py
+++ b/lib/rucio/web/rest/flaskapi/v1/replicas.py
@@ -43,7 +43,7 @@
 from rucio.common.config import config_get, config_get_int
 from rucio.common.constants import SUPPORTED_PROTOCOLS
 from rucio.common.exception import AccessDenied, DataIdentifierAlreadyExists, DataIdentifierNotFound, Duplicate, InvalidObject, InvalidPath, InvalidType, ReplicaIsLocked, ReplicaNotFound, ResourceTemporaryUnavailable, RSENotFound, ScopeNotFound
-from rucio.common.utils import APIEncoder, parse_response, render_json_list
+from rucio.common.utils import APIEncoder, parse_response, render_json
 from rucio.core.replica_sorter import sort_replicas
 from rucio.db.sqla.constants import BadFilesStatus
 from rucio.web.rest.flaskapi.authenticated_bp import AuthenticatedBlueprint
@@ -1066,7 +1066,7 @@ def get(self):
                 nattempts = int(params['nattempts'][0])
 
         result = get_suspicious_files(rse_expression=rse_expression, younger_than=younger_than, nattempts=nattempts, vo=request.environ.get('vo'))
-        return Response(render_json_list(result), 200, content_type='application/json')
+        return Response(render_json(result), 200, content_type='application/json')
 
 
 class BadReplicasStates(ErrorHandlingMethodView):