diff --git a/requirements-swh.txt b/requirements-swh.txt
--- a/requirements-swh.txt
+++ b/requirements-swh.txt
@@ -1,2 +1,2 @@
 swh.core[http] >= 0.4
-swh.model >= 1.0.0
+swh.model >= 3.0.0
diff --git a/swh/deposit/api/common.py b/swh/deposit/api/common.py
--- a/swh/deposit/api/common.py
+++ b/swh/deposit/api/common.py
@@ -29,18 +29,18 @@
 from swh.deposit.models import Deposit
 from swh.deposit.utils import compute_metadata_context
 from swh.model import hashutil
-from swh.model.identifiers import (
-    ExtendedObjectType,
-    ExtendedSWHID,
-    QualifiedSWHID,
-    ValidationError,
-)
 from swh.model.model import (
     MetadataAuthority,
     MetadataAuthorityType,
     Origin,
     RawExtrinsicMetadata,
 )
+from swh.model.swhids import (
+    ExtendedObjectType,
+    ExtendedSWHID,
+    QualifiedSWHID,
+    ValidationError,
+)
 from swh.scheduler.utils import create_oneshot_task_dict
 
 from ..config import (
diff --git a/swh/deposit/api/edit.py b/swh/deposit/api/edit.py
--- a/swh/deposit/api/edit.py
+++ b/swh/deposit/api/edit.py
@@ -6,7 +6,7 @@
 from rest_framework.request import Request
 
 from swh.deposit.models import Deposit
-from swh.model.identifiers import QualifiedSWHID
+from swh.model.swhids import QualifiedSWHID
 
 from ..config import DEPOSIT_STATUS_LOAD_SUCCESS
 from ..errors import BAD_REQUEST, DepositError, ParserError
diff --git a/swh/deposit/api/private/deposit_update_status.py b/swh/deposit/api/private/deposit_update_status.py
--- a/swh/deposit/api/private/deposit_update_status.py
+++ b/swh/deposit/api/private/deposit_update_status.py
@@ -6,7 +6,7 @@
 from rest_framework.parsers import JSONParser
 
 from swh.model.hashutil import hash_to_bytes
-from swh.model.identifiers import CoreSWHID, ObjectType, QualifiedSWHID
+from swh.model.swhids import CoreSWHID, ObjectType, QualifiedSWHID
 
 from . import APIPrivateView
 from ...errors import BAD_REQUEST, DepositError
diff --git a/swh/deposit/migrations/0018_migrate_swhids.py b/swh/deposit/migrations/0018_migrate_swhids.py
--- a/swh/deposit/migrations/0018_migrate_swhids.py
+++ b/swh/deposit/migrations/0018_migrate_swhids.py
@@ -15,7 +15,7 @@
 from swh.core import config
 from swh.deposit.config import DEPOSIT_STATUS_LOAD_SUCCESS
 from swh.model.hashutil import hash_to_bytes, hash_to_hex
-from swh.model.identifiers import CoreSWHID, ObjectType, QualifiedSWHID
+from swh.model.swhids import CoreSWHID, ObjectType, QualifiedSWHID
 from swh.storage import get_storage as get_storage_client
 from swh.storage.algos.snapshot import snapshot_id_get_from_revision
 
diff --git a/swh/deposit/tests/api/test_collection_post_atom.py b/swh/deposit/tests/api/test_collection_post_atom.py
--- a/swh/deposit/tests/api/test_collection_post_atom.py
+++ b/swh/deposit/tests/api/test_collection_post_atom.py
@@ -32,7 +32,6 @@
     revisions,
     snapshots,
 )
-from swh.model.identifiers import ObjectType, QualifiedSWHID
 from swh.model.model import (
     MetadataAuthority,
     MetadataAuthorityType,
@@ -40,6 +39,7 @@
     Origin,
     RawExtrinsicMetadata,
 )
+from swh.model.swhids import ObjectType, QualifiedSWHID
 from swh.storage.interface import PagedResult
 
 
diff --git a/swh/deposit/tests/api/test_deposit_update_atom.py b/swh/deposit/tests/api/test_deposit_update_atom.py
--- a/swh/deposit/tests/api/test_deposit_update_atom.py
+++ b/swh/deposit/tests/api/test_deposit_update_atom.py
@@ -22,13 +22,13 @@
 from swh.deposit.parsers import parse_xml
 from swh.deposit.tests.common import post_atom, put_atom
 from swh.model.hashutil import hash_to_bytes
-from swh.model.identifiers import CoreSWHID, ExtendedSWHID, ObjectType
 from swh.model.model import (
     MetadataAuthority,
     MetadataAuthorityType,
     MetadataFetcher,
     RawExtrinsicMetadata,
 )
+from swh.model.swhids import CoreSWHID, ExtendedSWHID, ObjectType
 from swh.storage.interface import PagedResult
 
 
diff --git a/swh/deposit/tests/conftest.py b/swh/deposit/tests/conftest.py
--- a/swh/deposit/tests/conftest.py
+++ b/swh/deposit/tests/conftest.py
@@ -42,7 +42,7 @@
     post_atom,
 )
 from swh.model.hashutil import hash_to_bytes
-from swh.model.identifiers import CoreSWHID, ObjectType, QualifiedSWHID
+from swh.model.swhids import CoreSWHID, ObjectType, QualifiedSWHID
 from swh.scheduler import get_scheduler
 
 if TYPE_CHECKING:
diff --git a/swh/deposit/tests/test_utils.py b/swh/deposit/tests/test_utils.py
--- a/swh/deposit/tests/test_utils.py
+++ b/swh/deposit/tests/test_utils.py
@@ -8,7 +8,7 @@
 from swh.deposit import utils
 from swh.deposit.parsers import parse_xml
 from swh.model.exceptions import ValidationError
-from swh.model.identifiers import CoreSWHID, QualifiedSWHID
+from swh.model.swhids import CoreSWHID, QualifiedSWHID
 
 
 @pytest.fixture
diff --git a/swh/deposit/utils.py b/swh/deposit/utils.py
--- a/swh/deposit/utils.py
+++ b/swh/deposit/utils.py
@@ -11,12 +11,8 @@
 import xmltodict
 
 from swh.model.exceptions import ValidationError
-from swh.model.identifiers import (
-    ExtendedSWHID,
-    ObjectType,
-    QualifiedSWHID,
-    normalize_timestamp,
-)
+from swh.model.model import TimestampWithTimezone
+from swh.model.swhids import ExtendedSWHID, ObjectType, QualifiedSWHID
 
 logger = logging.getLogger(__name__)
 
@@ -102,7 +98,7 @@
     dateutil.parser.parse to extract a datetime.
 
     Then normalize it through
-    swh.model.identifiers.normalize_timestamp.
+    :class:`swh.model.model.TimestampWithTimezone`
 
     Returns
         The swh date object
@@ -113,7 +109,7 @@
     if isinstance(date, str):
         date = iso8601.parse_date(date)
 
-    return normalize_timestamp(date)
+    return TimestampWithTimezone.from_dict(date).to_dict()
 
 
 def compute_metadata_context(swhid_reference: QualifiedSWHID) -> Dict[str, Any]: