diff --git a/google/cloud/api_keys_v2/services/api_keys/transports/rest.py b/google/cloud/api_keys_v2/services/api_keys/transports/rest.py
index 4ef0d99..2b82626 100644
--- a/google/cloud/api_keys_v2/services/api_keys/transports/rest.py
+++ b/google/cloud/api_keys_v2/services/api_keys/transports/rest.py
@@ -17,7 +17,7 @@
 import dataclasses
 import json  # type: ignore
 import re
-from typing import Callable, Dict, List, Optional, Sequence, Tuple, Union
+from typing import Any, Callable, Dict, List, Optional, Sequence, Tuple, Union
 import warnings
 
 from google.api_core import (
@@ -312,7 +312,7 @@ def pre_get_operation(
         self,
         request: operations_pb2.GetOperationRequest,
         metadata: Sequence[Tuple[str, str]],
-    ) -> operations_pb2.Operation:
+    ) -> Tuple[operations_pb2.GetOperationRequest, Sequence[Tuple[str, str]]]:
         """Pre-rpc interceptor for get_operation
 
         Override in a subclass to manipulate the request or metadata
@@ -321,7 +321,7 @@ def pre_get_operation(
         return request, metadata
 
     def post_get_operation(
-        self, response: operations_pb2.GetOperationRequest
+        self, response: operations_pb2.Operation
     ) -> operations_pb2.Operation:
         """Post-rpc interceptor for get_operation
 
@@ -467,7 +467,7 @@ class _CreateKey(ApiKeysRestStub):
         def __hash__(self):
             return hash("CreateKey")
 
-        __REQUIRED_FIELDS_DEFAULT_VALUES: Dict[str, str] = {}
+        __REQUIRED_FIELDS_DEFAULT_VALUES: Dict[str, Any] = {}
 
         @classmethod
         def _get_unset_required_fields(cls, message_dict):
@@ -563,7 +563,7 @@ class _DeleteKey(ApiKeysRestStub):
         def __hash__(self):
             return hash("DeleteKey")
 
-        __REQUIRED_FIELDS_DEFAULT_VALUES: Dict[str, str] = {}
+        __REQUIRED_FIELDS_DEFAULT_VALUES: Dict[str, Any] = {}
 
         @classmethod
         def _get_unset_required_fields(cls, message_dict):
@@ -650,7 +650,7 @@ class _GetKey(ApiKeysRestStub):
         def __hash__(self):
             return hash("GetKey")
 
-        __REQUIRED_FIELDS_DEFAULT_VALUES: Dict[str, str] = {}
+        __REQUIRED_FIELDS_DEFAULT_VALUES: Dict[str, Any] = {}
 
         @classmethod
         def _get_unset_required_fields(cls, message_dict):
@@ -738,7 +738,7 @@ class _GetKeyString(ApiKeysRestStub):
         def __hash__(self):
             return hash("GetKeyString")
 
-        __REQUIRED_FIELDS_DEFAULT_VALUES: Dict[str, str] = {}
+        __REQUIRED_FIELDS_DEFAULT_VALUES: Dict[str, Any] = {}
 
         @classmethod
         def _get_unset_required_fields(cls, message_dict):
@@ -824,7 +824,7 @@ class _ListKeys(ApiKeysRestStub):
         def __hash__(self):
             return hash("ListKeys")
 
-        __REQUIRED_FIELDS_DEFAULT_VALUES: Dict[str, str] = {}
+        __REQUIRED_FIELDS_DEFAULT_VALUES: Dict[str, Any] = {}
 
         @classmethod
         def _get_unset_required_fields(cls, message_dict):
@@ -910,7 +910,7 @@ class _LookupKey(ApiKeysRestStub):
         def __hash__(self):
             return hash("LookupKey")
 
-        __REQUIRED_FIELDS_DEFAULT_VALUES: Dict[str, str] = {
+        __REQUIRED_FIELDS_DEFAULT_VALUES: Dict[str, Any] = {
             "keyString": "",
         }
 
@@ -998,7 +998,7 @@ class _UndeleteKey(ApiKeysRestStub):
         def __hash__(self):
             return hash("UndeleteKey")
 
-        __REQUIRED_FIELDS_DEFAULT_VALUES: Dict[str, str] = {}
+        __REQUIRED_FIELDS_DEFAULT_VALUES: Dict[str, Any] = {}
 
         @classmethod
         def _get_unset_required_fields(cls, message_dict):
@@ -1094,7 +1094,7 @@ class _UpdateKey(ApiKeysRestStub):
         def __hash__(self):
             return hash("UpdateKey")
 
-        __REQUIRED_FIELDS_DEFAULT_VALUES: Dict[str, str] = {}
+        __REQUIRED_FIELDS_DEFAULT_VALUES: Dict[str, Any] = {}
 
         @classmethod
         def _get_unset_required_fields(cls, message_dict):
diff --git a/google/cloud/api_keys_v2/types/apikeys.py b/google/cloud/api_keys_v2/types/apikeys.py
index 142b8fd..235c81b 100644
--- a/google/cloud/api_keys_v2/types/apikeys.py
+++ b/google/cloud/api_keys_v2/types/apikeys.py
@@ -13,6 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+from __future__ import annotations
+
 from typing import MutableMapping, MutableSequence
 
 from google.protobuf import field_mask_pb2  # type: ignore
diff --git a/google/cloud/api_keys_v2/types/resources.py b/google/cloud/api_keys_v2/types/resources.py
index e76e6c6..a75ff4c 100644
--- a/google/cloud/api_keys_v2/types/resources.py
+++ b/google/cloud/api_keys_v2/types/resources.py
@@ -13,6 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+from __future__ import annotations
+
 from typing import MutableMapping, MutableSequence
 
 from google.protobuf import timestamp_pb2  # type: ignore