diff --git a/packages/postgres-database/tests/test_utils_projects.py b/packages/postgres-database/tests/test_utils_projects.py
index 9af318fca38..c0c00d271e6 100644
--- a/packages/postgres-database/tests/test_utils_projects.py
+++ b/packages/postgres-database/tests/test_utils_projects.py
@@ -12,7 +12,7 @@
 from aiopg.sa.connection import SAConnection
 from aiopg.sa.result import RowProxy
 from faker import Faker
-from pydantic import parse_obj_as
+from pydantic import TypeAdapter
 from simcore_postgres_database.models.projects import projects
 from simcore_postgres_database.utils_projects import (
     DBProjectNotFoundError,
@@ -69,7 +69,7 @@ async def test_get_project_trashed_at_column_can_be_converted_to_datetime(
 
         row = result.fetchone()
 
-    trashed_at = parse_obj_as(datetime | None, row.trashed_at)
+    trashed_at = TypeAdapter(datetime | None).validate_python(row.trashed_at)
     assert trashed_at == expected
 
 
diff --git a/packages/service-library/src/servicelib/rabbitmq/rpc_interfaces/agent/volumes.py b/packages/service-library/src/servicelib/rabbitmq/rpc_interfaces/agent/volumes.py
index d414cd6b979..043898dcb30 100644
--- a/packages/service-library/src/servicelib/rabbitmq/rpc_interfaces/agent/volumes.py
+++ b/packages/service-library/src/servicelib/rabbitmq/rpc_interfaces/agent/volumes.py
@@ -4,7 +4,7 @@
 
 from models_library.projects_nodes_io import NodeID
 from models_library.rabbitmq_basic_types import RPCMethodName, RPCNamespace
-from pydantic import NonNegativeInt, parse_obj_as
+from pydantic import NonNegativeInt, TypeAdapter
 from servicelib.logging_utils import log_decorator
 from servicelib.rabbitmq import RabbitMQRPCClient
 
@@ -29,7 +29,9 @@ async def remove_volumes_without_backup_for_service(
                 "swarm_stack_name": swarm_stack_name,
             }
         ),
-        parse_obj_as(RPCMethodName, "remove_volumes_without_backup_for_service"),
+        TypeAdapter(RPCMethodName).validate_python(
+            "remove_volumes_without_backup_for_service"
+        ),
         node_id=node_id,
         timeout_s=_REQUEST_TIMEOUT,
     )
@@ -51,7 +53,9 @@ async def backup_and_remove_volumes_for_all_services(
                 "swarm_stack_name": swarm_stack_name,
             }
         ),
-        parse_obj_as(RPCMethodName, "backup_and_remove_volumes_for_all_services"),
+        TypeAdapter(RPCMethodName).validate_python(
+            "backup_and_remove_volumes_for_all_services"
+        ),
         timeout_s=_REQUEST_TIMEOUT,
     )
     assert result is None  # nosec
diff --git a/packages/service-library/src/servicelib/rabbitmq/rpc_interfaces/dynamic_sidecar/disk_usage.py b/packages/service-library/src/servicelib/rabbitmq/rpc_interfaces/dynamic_sidecar/disk_usage.py
index 5938ad871ff..dbace2f1f4b 100644
--- a/packages/service-library/src/servicelib/rabbitmq/rpc_interfaces/dynamic_sidecar/disk_usage.py
+++ b/packages/service-library/src/servicelib/rabbitmq/rpc_interfaces/dynamic_sidecar/disk_usage.py
@@ -1,14 +1,20 @@
 import logging
+from typing import Final
 
 from models_library.api_schemas_dynamic_sidecar.telemetry import DiskUsage
 from models_library.projects_nodes_io import NodeID
 from models_library.rabbitmq_basic_types import RPCMethodName, RPCNamespace
-from pydantic import parse_obj_as
-from servicelib.logging_utils import log_decorator
-from servicelib.rabbitmq import RabbitMQRPCClient
+from pydantic import TypeAdapter
+
+from ....logging_utils import log_decorator
+from ... import RabbitMQRPCClient
 
 _logger = logging.getLogger(__name__)
 
+_UPDATE_DISK_USAGE: Final[RPCMethodName] = TypeAdapter(RPCMethodName).validate_python(
+    "update_disk_usage"
+)
+
 
 @log_decorator(_logger, level=logging.DEBUG)
 async def update_disk_usage(
@@ -21,6 +27,8 @@ async def update_disk_usage(
         {"service": "dy-sidecar", "node_id": f"{node_id}"}
     )
     result = await rabbitmq_rpc_client.request(
-        rpc_namespace, parse_obj_as(RPCMethodName, "update_disk_usage"), usage=usage
+        rpc_namespace,
+        _UPDATE_DISK_USAGE,
+        usage=usage,
     )
     assert result is None  # nosec
diff --git a/services/osparc-gateway-server/src/osparc_gateway_server/backend/models.py b/services/osparc-gateway-server/src/osparc_gateway_server/backend/models.py
index 43e2240270d..9cdd2fc9edb 100644
--- a/services/osparc-gateway-server/src/osparc_gateway_server/backend/models.py
+++ b/services/osparc-gateway-server/src/osparc_gateway_server/backend/models.py
@@ -1,7 +1,8 @@
+from collections.abc import Mapping
 from ipaddress import IPv4Address
-from typing import Any, Mapping, Union
+from typing import Any, Union
 
-from pydantic import BaseModel, ByteSize, Field, PositiveFloat, parse_obj_as
+from pydantic import BaseModel, ByteSize, Field, PositiveFloat, TypeAdapter
 
 Hostname = str
 ResourceName = str
@@ -26,8 +27,7 @@ class NodeInformation(BaseModel):
 def cluster_information_from_docker_nodes(
     nodes_list: list[Mapping[str, Any]]
 ) -> ClusterInformation:
-    return parse_obj_as(
-        ClusterInformation,
+    return TypeAdapter(ClusterInformation).validate_python(
         {
             node["Description"]["Hostname"]: {
                 "docker_node_id": node["ID"],
@@ -38,5 +38,5 @@ def cluster_information_from_docker_nodes(
                 },
             }
             for node in nodes_list
-        },
+        }
     )