diff --git a/libs/skyline-apiserver/skyline_apiserver/client/openstack/glance.py b/libs/skyline-apiserver/skyline_apiserver/client/openstack/glance.py
index 12be357..c438d59 100644
--- a/libs/skyline-apiserver/skyline_apiserver/client/openstack/glance.py
+++ b/libs/skyline-apiserver/skyline_apiserver/client/openstack/glance.py
@@ -28,7 +28,7 @@ from skyline_apiserver.client import utils
 async def list_images(
     profile: schemas.Profile,
     session: Session,
-    filters: Dict[str, Any] = {},
+    filters: Dict[str, Any] = None,
 ) -> Any:
     try:
         kwargs = {}
diff --git a/libs/skyline-apiserver/skyline_apiserver/client/openstack/keystone.py b/libs/skyline-apiserver/skyline_apiserver/client/openstack/keystone.py
index c93a5c9..45bcb1c 100644
--- a/libs/skyline-apiserver/skyline_apiserver/client/openstack/keystone.py
+++ b/libs/skyline-apiserver/skyline_apiserver/client/openstack/keystone.py
@@ -29,9 +29,10 @@ async def list_projects(
     profile: schemas.Profile,
     all_projects: bool,
     session: Session,
-    search_opts: Dict[str, Any] = {},
+    search_opts: Dict[str, Any] = None,
 ) -> Any:
     try:
+        search_opts = search_opts if search_opts else {}
         kc = await utils.keystone_client(session=session, region=profile.region)
         if not all_projects:
             search_opts["user"] = profile.user.id