diff --git a/packages/models-library/src/models_library/osparc_variable_identifier.py b/packages/models-library/src/models_library/osparc_variable_identifier.py
index a4b0d4e882b..80a8e6d0fc0 100644
--- a/packages/models-library/src/models_library/osparc_variable_identifier.py
+++ b/packages/models-library/src/models_library/osparc_variable_identifier.py
@@ -1,8 +1,9 @@
 from copy import deepcopy
 from typing import Any, TypeVar
 
+from common_library.errors_classes import OsparcErrorMixin
 from models_library.basic_types import ConstrainedStr
-from models_library.errors_classes import OsparcErrorMixin
+
 from pydantic import BaseModel
 
 from .utils.string_substitution import OSPARC_IDENTIFIER_PREFIX
diff --git a/packages/models-library/src/models_library/utils/specs_substitution.py b/packages/models-library/src/models_library/utils/specs_substitution.py
index 73260237b22..d8a7e9cf161 100644
--- a/packages/models-library/src/models_library/utils/specs_substitution.py
+++ b/packages/models-library/src/models_library/utils/specs_substitution.py
@@ -1,6 +1,7 @@
 from typing import Any, NamedTuple, TypeAlias, cast
 
-from models_library.errors_classes import OsparcErrorMixin
+from common_library.errors_classes import OsparcErrorMixin
+
 from pydantic import StrictBool, StrictFloat, StrictInt
 
 from .json_serialization import json_dumps, json_loads
diff --git a/packages/models-library/tests/test_errors_classes.py b/packages/models-library/tests/test_errors_classes.py
index 754367805e2..ae0ed8c1e3d 100644
--- a/packages/models-library/tests/test_errors_classes.py
+++ b/packages/models-library/tests/test_errors_classes.py
@@ -9,7 +9,7 @@
 from typing import Any
 
 import pytest
-from models_library.errors_classes import OsparcErrorMixin
+from common_library.errors_classes import OsparcErrorMixin
 
 
 def test_get_full_class_name():
diff --git a/packages/notifications-library/src/notifications_library/errors.py b/packages/notifications-library/src/notifications_library/errors.py
index 2ffaa461a02..21edbbb0dc7 100644
--- a/packages/notifications-library/src/notifications_library/errors.py
+++ b/packages/notifications-library/src/notifications_library/errors.py
@@ -1,6 +1,6 @@
 from typing import Any
 
-from models_library.errors_classes import OsparcErrorMixin
+from common_library.errors_classes import OsparcErrorMixin
 
 
 class NotifierError(OsparcErrorMixin, Exception):
diff --git a/packages/service-library/src/servicelib/rabbitmq/rpc_interfaces/catalog/errors.py b/packages/service-library/src/servicelib/rabbitmq/rpc_interfaces/catalog/errors.py
index 65c403853ea..5837beddcae 100644
--- a/packages/service-library/src/servicelib/rabbitmq/rpc_interfaces/catalog/errors.py
+++ b/packages/service-library/src/servicelib/rabbitmq/rpc_interfaces/catalog/errors.py
@@ -1,6 +1,6 @@
 from typing import Any
 
-from models_library.errors_classes import OsparcErrorMixin
+from common_library.errors_classes import OsparcErrorMixin
 
 
 class CatalogApiBaseError(OsparcErrorMixin, Exception):