diff --git a/synapse/rest/client/account.py b/synapse/rest/client/account.py
index 49cd0805fd..e74a87af4d 100644
--- a/synapse/rest/client/account.py
+++ b/synapse/rest/client/account.py
@@ -18,7 +18,12 @@ import random
from typing import TYPE_CHECKING, List, Optional, Tuple
from urllib.parse import urlparse
-from pydantic import StrictBool, StrictStr, constr
+from synapse._pydantic_compat import HAS_PYDANTIC_V2
+
+if TYPE_CHECKING or HAS_PYDANTIC_V2:
+ from pydantic.v1 import StrictBool, StrictStr, constr
+else:
+ from pydantic import StrictBool, StrictStr, constr
from typing_extensions import Literal
from twisted.web.server import Request
diff --git a/synapse/rest/client/devices.py b/synapse/rest/client/devices.py
index 925f037743..80ae937921 100644
--- a/synapse/rest/client/devices.py
+++ b/synapse/rest/client/devices.py
@@ -17,7 +17,12 @@ import logging
from http import HTTPStatus
from typing import TYPE_CHECKING, List, Optional, Tuple
-from pydantic import Extra, StrictStr
+from synapse._pydantic_compat import HAS_PYDANTIC_V2
+
+if TYPE_CHECKING or HAS_PYDANTIC_V2:
+ from pydantic.v1 import Extra, StrictStr
+else:
+ from pydantic import Extra, StrictStr
from synapse.api import errors
from synapse.api.errors import NotFoundError, SynapseError, UnrecognizedRequestError
diff --git a/synapse/rest/client/directory.py b/synapse/rest/client/directory.py
index 570bb52747..82944ca711 100644
--- a/synapse/rest/client/directory.py
+++ b/synapse/rest/client/directory.py
@@ -15,7 +15,13 @@
import logging
from typing import TYPE_CHECKING, List, Optional, Tuple
-from pydantic import StrictStr
+from synapse._pydantic_compat import HAS_PYDANTIC_V2
+
+if TYPE_CHECKING or HAS_PYDANTIC_V2:
+ from pydantic.v1 import StrictStr
+else:
+ from pydantic import StrictStr
+
from typing_extensions import Literal
from twisted.web.server import Request
diff --git a/synapse/rest/client/models.py b/synapse/rest/client/models.py
index 3d7940b0fc..880f79473c 100644
--- a/synapse/rest/client/models.py
+++ b/synapse/rest/client/models.py
@@ -13,7 +13,12 @@
# limitations under the License.
from typing import TYPE_CHECKING, Dict, Optional
-from pydantic import Extra, StrictInt, StrictStr, constr, validator
+from synapse._pydantic_compat import HAS_PYDANTIC_V2
+
+if TYPE_CHECKING or HAS_PYDANTIC_V2:
+ from pydantic.v1 import Extra, StrictInt, StrictStr, constr, validator
+else:
+ from pydantic import Extra, StrictInt, StrictStr, constr, validator
from synapse.rest.models import RequestBodyModel
from synapse.util.threepids import validate_email
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