diff --git a/.coveragerc b/.coveragerc
index da7caa1..bcaea1e 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -10,8 +10,3 @@ exclude_lines =
     pragma: NO COVER
     # Ignore debug-only repr
     def __repr__
-    # Ignore pkg_resources exceptions.
-    # This is added at the module level as a safeguard for if someone
-    # generates the code and tries to run it without pip installing. This
-    # makes it virtually impossible to test properly.
-    except pkg_resources.DistributionNotFound
diff --git a/google/cloud/dataflow_v1beta3/gapic_version.py b/google/cloud/dataflow_v1beta3/gapic_version.py
new file mode 100644
index 0000000..944f5ff
--- /dev/null
+++ b/google/cloud/dataflow_v1beta3/gapic_version.py
@@ -0,0 +1,16 @@
+# -*- coding: utf-8 -*-
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+__version__ = "0.6.2"  # {x-release-please-version}
diff --git a/google/cloud/dataflow_v1beta3/services/flex_templates_service/async_client.py b/google/cloud/dataflow_v1beta3/services/flex_templates_service/async_client.py
index 75ffb7d..9e9ae8a 100644
--- a/google/cloud/dataflow_v1beta3/services/flex_templates_service/async_client.py
+++ b/google/cloud/dataflow_v1beta3/services/flex_templates_service/async_client.py
@@ -34,7 +34,8 @@
 from google.api_core.client_options import ClientOptions
 from google.auth import credentials as ga_credentials  # type: ignore
 from google.oauth2 import service_account  # type: ignore
-import pkg_resources
+
+from google.cloud.dataflow_v1beta3 import gapic_version as package_version
 
 try:
     OptionalRetry = Union[retries.Retry, gapic_v1.method._MethodDefault]
@@ -218,7 +219,7 @@ async def launch_flex_template(
         request: Optional[Union[templates.LaunchFlexTemplateRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> templates.LaunchFlexTemplateResponse:
         r"""Launch a job with a FlexTemplate.
@@ -304,14 +305,9 @@ async def __aexit__(self, exc_type, exc, tb):
         await self.transport.close()
 
 
-try:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
-        gapic_version=pkg_resources.get_distribution(
-            "google-cloud-dataflow-client",
-        ).version,
-    )
-except pkg_resources.DistributionNotFound:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo()
+DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
+    gapic_version=package_version.__version__
+)
 
 
 __all__ = ("FlexTemplatesServiceAsyncClient",)
diff --git a/google/cloud/dataflow_v1beta3/services/flex_templates_service/client.py b/google/cloud/dataflow_v1beta3/services/flex_templates_service/client.py
index daac1c8..c816ef2 100644
--- a/google/cloud/dataflow_v1beta3/services/flex_templates_service/client.py
+++ b/google/cloud/dataflow_v1beta3/services/flex_templates_service/client.py
@@ -38,7 +38,8 @@
 from google.auth.transport import mtls  # type: ignore
 from google.auth.transport.grpc import SslCredentials  # type: ignore
 from google.oauth2 import service_account  # type: ignore
-import pkg_resources
+
+from google.cloud.dataflow_v1beta3 import gapic_version as package_version
 
 try:
     OptionalRetry = Union[retries.Retry, gapic_v1.method._MethodDefault]
@@ -426,7 +427,7 @@ def launch_flex_template(
         request: Optional[Union[templates.LaunchFlexTemplateRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> templates.LaunchFlexTemplateResponse:
         r"""Launch a job with a FlexTemplate.
@@ -520,14 +521,9 @@ def __exit__(self, type, value, traceback):
         self.transport.close()
 
 
-try:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
-        gapic_version=pkg_resources.get_distribution(
-            "google-cloud-dataflow-client",
-        ).version,
-    )
-except pkg_resources.DistributionNotFound:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo()
+DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
+    gapic_version=package_version.__version__
+)
 
 
 __all__ = ("FlexTemplatesServiceClient",)
diff --git a/google/cloud/dataflow_v1beta3/services/flex_templates_service/transports/base.py b/google/cloud/dataflow_v1beta3/services/flex_templates_service/transports/base.py
index 21a2875..15579b0 100644
--- a/google/cloud/dataflow_v1beta3/services/flex_templates_service/transports/base.py
+++ b/google/cloud/dataflow_v1beta3/services/flex_templates_service/transports/base.py
@@ -23,18 +23,13 @@
 import google.auth  # type: ignore
 from google.auth import credentials as ga_credentials  # type: ignore
 from google.oauth2 import service_account  # type: ignore
-import pkg_resources
 
+from google.cloud.dataflow_v1beta3 import gapic_version as package_version
 from google.cloud.dataflow_v1beta3.types import templates
 
-try:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
-        gapic_version=pkg_resources.get_distribution(
-            "google-cloud-dataflow-client",
-        ).version,
-    )
-except pkg_resources.DistributionNotFound:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo()
+DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
+    gapic_version=package_version.__version__
+)
 
 
 class FlexTemplatesServiceTransport(abc.ABC):
diff --git a/google/cloud/dataflow_v1beta3/services/jobs_v1_beta3/async_client.py b/google/cloud/dataflow_v1beta3/services/jobs_v1_beta3/async_client.py
index d2549b4..abf20fb 100644
--- a/google/cloud/dataflow_v1beta3/services/jobs_v1_beta3/async_client.py
+++ b/google/cloud/dataflow_v1beta3/services/jobs_v1_beta3/async_client.py
@@ -34,7 +34,8 @@
 from google.api_core.client_options import ClientOptions
 from google.auth import credentials as ga_credentials  # type: ignore
 from google.oauth2 import service_account  # type: ignore
-import pkg_resources
+
+from google.cloud.dataflow_v1beta3 import gapic_version as package_version
 
 try:
     OptionalRetry = Union[retries.Retry, gapic_v1.method._MethodDefault]
@@ -218,7 +219,7 @@ async def create_job(
         request: Optional[Union[jobs.CreateJobRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> jobs.Job:
         r"""Creates a Cloud Dataflow job.
@@ -308,7 +309,7 @@ async def get_job(
         request: Optional[Union[jobs.GetJobRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> jobs.Job:
         r"""Gets the state of the specified Cloud Dataflow job.
@@ -399,7 +400,7 @@ async def update_job(
         request: Optional[Union[jobs.UpdateJobRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> jobs.Job:
         r"""Updates the state of an existing Cloud Dataflow job.
@@ -491,7 +492,7 @@ async def list_jobs(
         request: Optional[Union[jobs.ListJobsRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> pagers.ListJobsAsyncPager:
         r"""List the jobs of a project.
@@ -602,7 +603,7 @@ async def aggregated_list_jobs(
         request: Optional[Union[jobs.ListJobsRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> pagers.AggregatedListJobsAsyncPager:
         r"""List the jobs of a project across all regions.
@@ -702,7 +703,7 @@ async def check_active_jobs(
         request: Optional[Union[jobs.CheckActiveJobsRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> jobs.CheckActiveJobsResponse:
         r"""Check for existence of active jobs in the given
@@ -774,7 +775,7 @@ async def snapshot_job(
         request: Optional[Union[jobs.SnapshotJobRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> snapshots.Snapshot:
         r"""Snapshot the state of a streaming job.
@@ -859,14 +860,9 @@ async def __aexit__(self, exc_type, exc, tb):
         await self.transport.close()
 
 
-try:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
-        gapic_version=pkg_resources.get_distribution(
-            "google-cloud-dataflow-client",
-        ).version,
-    )
-except pkg_resources.DistributionNotFound:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo()
+DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
+    gapic_version=package_version.__version__
+)
 
 
 __all__ = ("JobsV1Beta3AsyncClient",)
diff --git a/google/cloud/dataflow_v1beta3/services/jobs_v1_beta3/client.py b/google/cloud/dataflow_v1beta3/services/jobs_v1_beta3/client.py
index 3b49762..b278651 100644
--- a/google/cloud/dataflow_v1beta3/services/jobs_v1_beta3/client.py
+++ b/google/cloud/dataflow_v1beta3/services/jobs_v1_beta3/client.py
@@ -38,7 +38,8 @@
 from google.auth.transport import mtls  # type: ignore
 from google.auth.transport.grpc import SslCredentials  # type: ignore
 from google.oauth2 import service_account  # type: ignore
-import pkg_resources
+
+from google.cloud.dataflow_v1beta3 import gapic_version as package_version
 
 try:
     OptionalRetry = Union[retries.Retry, gapic_v1.method._MethodDefault]
@@ -429,7 +430,7 @@ def create_job(
         request: Optional[Union[jobs.CreateJobRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> jobs.Job:
         r"""Creates a Cloud Dataflow job.
@@ -520,7 +521,7 @@ def get_job(
         request: Optional[Union[jobs.GetJobRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> jobs.Job:
         r"""Gets the state of the specified Cloud Dataflow job.
@@ -612,7 +613,7 @@ def update_job(
         request: Optional[Union[jobs.UpdateJobRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> jobs.Job:
         r"""Updates the state of an existing Cloud Dataflow job.
@@ -705,7 +706,7 @@ def list_jobs(
         request: Optional[Union[jobs.ListJobsRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> pagers.ListJobsPager:
         r"""List the jobs of a project.
@@ -817,7 +818,7 @@ def aggregated_list_jobs(
         request: Optional[Union[jobs.ListJobsRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> pagers.AggregatedListJobsPager:
         r"""List the jobs of a project across all regions.
@@ -918,7 +919,7 @@ def check_active_jobs(
         request: Optional[Union[jobs.CheckActiveJobsRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> jobs.CheckActiveJobsResponse:
         r"""Check for existence of active jobs in the given
@@ -991,7 +992,7 @@ def snapshot_job(
         request: Optional[Union[jobs.SnapshotJobRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> snapshots.Snapshot:
         r"""Snapshot the state of a streaming job.
@@ -1084,14 +1085,9 @@ def __exit__(self, type, value, traceback):
         self.transport.close()
 
 
-try:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
-        gapic_version=pkg_resources.get_distribution(
-            "google-cloud-dataflow-client",
-        ).version,
-    )
-except pkg_resources.DistributionNotFound:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo()
+DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
+    gapic_version=package_version.__version__
+)
 
 
 __all__ = ("JobsV1Beta3Client",)
diff --git a/google/cloud/dataflow_v1beta3/services/jobs_v1_beta3/transports/base.py b/google/cloud/dataflow_v1beta3/services/jobs_v1_beta3/transports/base.py
index 9942fa1..9e3e0c8 100644
--- a/google/cloud/dataflow_v1beta3/services/jobs_v1_beta3/transports/base.py
+++ b/google/cloud/dataflow_v1beta3/services/jobs_v1_beta3/transports/base.py
@@ -23,18 +23,13 @@
 import google.auth  # type: ignore
 from google.auth import credentials as ga_credentials  # type: ignore
 from google.oauth2 import service_account  # type: ignore
-import pkg_resources
 
+from google.cloud.dataflow_v1beta3 import gapic_version as package_version
 from google.cloud.dataflow_v1beta3.types import jobs, snapshots
 
-try:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
-        gapic_version=pkg_resources.get_distribution(
-            "google-cloud-dataflow-client",
-        ).version,
-    )
-except pkg_resources.DistributionNotFound:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo()
+DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
+    gapic_version=package_version.__version__
+)
 
 
 class JobsV1Beta3Transport(abc.ABC):
diff --git a/google/cloud/dataflow_v1beta3/services/messages_v1_beta3/async_client.py b/google/cloud/dataflow_v1beta3/services/messages_v1_beta3/async_client.py
index 660510d..0157a0f 100644
--- a/google/cloud/dataflow_v1beta3/services/messages_v1_beta3/async_client.py
+++ b/google/cloud/dataflow_v1beta3/services/messages_v1_beta3/async_client.py
@@ -34,7 +34,8 @@
 from google.api_core.client_options import ClientOptions
 from google.auth import credentials as ga_credentials  # type: ignore
 from google.oauth2 import service_account  # type: ignore
-import pkg_resources
+
+from google.cloud.dataflow_v1beta3 import gapic_version as package_version
 
 try:
     OptionalRetry = Union[retries.Retry, gapic_v1.method._MethodDefault]
@@ -218,7 +219,7 @@ async def list_job_messages(
         request: Optional[Union[messages.ListJobMessagesRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> pagers.ListJobMessagesAsyncPager:
         r"""Request the job status.
@@ -329,14 +330,9 @@ async def __aexit__(self, exc_type, exc, tb):
         await self.transport.close()
 
 
-try:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
-        gapic_version=pkg_resources.get_distribution(
-            "google-cloud-dataflow-client",
-        ).version,
-    )
-except pkg_resources.DistributionNotFound:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo()
+DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
+    gapic_version=package_version.__version__
+)
 
 
 __all__ = ("MessagesV1Beta3AsyncClient",)
diff --git a/google/cloud/dataflow_v1beta3/services/messages_v1_beta3/client.py b/google/cloud/dataflow_v1beta3/services/messages_v1_beta3/client.py
index 6fe48d8..2bbd3f8 100644
--- a/google/cloud/dataflow_v1beta3/services/messages_v1_beta3/client.py
+++ b/google/cloud/dataflow_v1beta3/services/messages_v1_beta3/client.py
@@ -38,7 +38,8 @@
 from google.auth.transport import mtls  # type: ignore
 from google.auth.transport.grpc import SslCredentials  # type: ignore
 from google.oauth2 import service_account  # type: ignore
-import pkg_resources
+
+from google.cloud.dataflow_v1beta3 import gapic_version as package_version
 
 try:
     OptionalRetry = Union[retries.Retry, gapic_v1.method._MethodDefault]
@@ -427,7 +428,7 @@ def list_job_messages(
         request: Optional[Union[messages.ListJobMessagesRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> pagers.ListJobMessagesPager:
         r"""Request the job status.
@@ -546,14 +547,9 @@ def __exit__(self, type, value, traceback):
         self.transport.close()
 
 
-try:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
-        gapic_version=pkg_resources.get_distribution(
-            "google-cloud-dataflow-client",
-        ).version,
-    )
-except pkg_resources.DistributionNotFound:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo()
+DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
+    gapic_version=package_version.__version__
+)
 
 
 __all__ = ("MessagesV1Beta3Client",)
diff --git a/google/cloud/dataflow_v1beta3/services/messages_v1_beta3/transports/base.py b/google/cloud/dataflow_v1beta3/services/messages_v1_beta3/transports/base.py
index 2735981..dcc57ac 100644
--- a/google/cloud/dataflow_v1beta3/services/messages_v1_beta3/transports/base.py
+++ b/google/cloud/dataflow_v1beta3/services/messages_v1_beta3/transports/base.py
@@ -23,18 +23,13 @@
 import google.auth  # type: ignore
 from google.auth import credentials as ga_credentials  # type: ignore
 from google.oauth2 import service_account  # type: ignore
-import pkg_resources
 
+from google.cloud.dataflow_v1beta3 import gapic_version as package_version
 from google.cloud.dataflow_v1beta3.types import messages
 
-try:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
-        gapic_version=pkg_resources.get_distribution(
-            "google-cloud-dataflow-client",
-        ).version,
-    )
-except pkg_resources.DistributionNotFound:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo()
+DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
+    gapic_version=package_version.__version__
+)
 
 
 class MessagesV1Beta3Transport(abc.ABC):
diff --git a/google/cloud/dataflow_v1beta3/services/metrics_v1_beta3/async_client.py b/google/cloud/dataflow_v1beta3/services/metrics_v1_beta3/async_client.py
index e58a20b..9af50ee 100644
--- a/google/cloud/dataflow_v1beta3/services/metrics_v1_beta3/async_client.py
+++ b/google/cloud/dataflow_v1beta3/services/metrics_v1_beta3/async_client.py
@@ -34,7 +34,8 @@
 from google.api_core.client_options import ClientOptions
 from google.auth import credentials as ga_credentials  # type: ignore
 from google.oauth2 import service_account  # type: ignore
-import pkg_resources
+
+from google.cloud.dataflow_v1beta3 import gapic_version as package_version
 
 try:
     OptionalRetry = Union[retries.Retry, gapic_v1.method._MethodDefault]
@@ -220,7 +221,7 @@ async def get_job_metrics(
         request: Optional[Union[metrics.GetJobMetricsRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> metrics.JobMetrics:
         r"""Request the job status.
@@ -321,7 +322,7 @@ async def get_job_execution_details(
         request: Optional[Union[metrics.GetJobExecutionDetailsRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> pagers.GetJobExecutionDetailsAsyncPager:
         r"""Request detailed information about the execution
@@ -422,7 +423,7 @@ async def get_stage_execution_details(
         request: Optional[Union[metrics.GetStageExecutionDetailsRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> pagers.GetStageExecutionDetailsAsyncPager:
         r"""Request detailed information about the execution
@@ -528,14 +529,9 @@ async def __aexit__(self, exc_type, exc, tb):
         await self.transport.close()
 
 
-try:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
-        gapic_version=pkg_resources.get_distribution(
-            "google-cloud-dataflow-client",
-        ).version,
-    )
-except pkg_resources.DistributionNotFound:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo()
+DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
+    gapic_version=package_version.__version__
+)
 
 
 __all__ = ("MetricsV1Beta3AsyncClient",)
diff --git a/google/cloud/dataflow_v1beta3/services/metrics_v1_beta3/client.py b/google/cloud/dataflow_v1beta3/services/metrics_v1_beta3/client.py
index f5c663b..faa6270 100644
--- a/google/cloud/dataflow_v1beta3/services/metrics_v1_beta3/client.py
+++ b/google/cloud/dataflow_v1beta3/services/metrics_v1_beta3/client.py
@@ -38,7 +38,8 @@
 from google.auth.transport import mtls  # type: ignore
 from google.auth.transport.grpc import SslCredentials  # type: ignore
 from google.oauth2 import service_account  # type: ignore
-import pkg_resources
+
+from google.cloud.dataflow_v1beta3 import gapic_version as package_version
 
 try:
     OptionalRetry = Union[retries.Retry, gapic_v1.method._MethodDefault]
@@ -429,7 +430,7 @@ def get_job_metrics(
         request: Optional[Union[metrics.GetJobMetricsRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> metrics.JobMetrics:
         r"""Request the job status.
@@ -531,7 +532,7 @@ def get_job_execution_details(
         request: Optional[Union[metrics.GetJobExecutionDetailsRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> pagers.GetJobExecutionDetailsPager:
         r"""Request detailed information about the execution
@@ -635,7 +636,7 @@ def get_stage_execution_details(
         request: Optional[Union[metrics.GetStageExecutionDetailsRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> pagers.GetStageExecutionDetailsPager:
         r"""Request detailed information about the execution
@@ -751,14 +752,9 @@ def __exit__(self, type, value, traceback):
         self.transport.close()
 
 
-try:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
-        gapic_version=pkg_resources.get_distribution(
-            "google-cloud-dataflow-client",
-        ).version,
-    )
-except pkg_resources.DistributionNotFound:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo()
+DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
+    gapic_version=package_version.__version__
+)
 
 
 __all__ = ("MetricsV1Beta3Client",)
diff --git a/google/cloud/dataflow_v1beta3/services/metrics_v1_beta3/transports/base.py b/google/cloud/dataflow_v1beta3/services/metrics_v1_beta3/transports/base.py
index 535552a..902ce8c 100644
--- a/google/cloud/dataflow_v1beta3/services/metrics_v1_beta3/transports/base.py
+++ b/google/cloud/dataflow_v1beta3/services/metrics_v1_beta3/transports/base.py
@@ -23,18 +23,13 @@
 import google.auth  # type: ignore
 from google.auth import credentials as ga_credentials  # type: ignore
 from google.oauth2 import service_account  # type: ignore
-import pkg_resources
 
+from google.cloud.dataflow_v1beta3 import gapic_version as package_version
 from google.cloud.dataflow_v1beta3.types import metrics
 
-try:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
-        gapic_version=pkg_resources.get_distribution(
-            "google-cloud-dataflow-client",
-        ).version,
-    )
-except pkg_resources.DistributionNotFound:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo()
+DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
+    gapic_version=package_version.__version__
+)
 
 
 class MetricsV1Beta3Transport(abc.ABC):
diff --git a/google/cloud/dataflow_v1beta3/services/snapshots_v1_beta3/async_client.py b/google/cloud/dataflow_v1beta3/services/snapshots_v1_beta3/async_client.py
index edfd34b..b0593b5 100644
--- a/google/cloud/dataflow_v1beta3/services/snapshots_v1_beta3/async_client.py
+++ b/google/cloud/dataflow_v1beta3/services/snapshots_v1_beta3/async_client.py
@@ -34,7 +34,8 @@
 from google.api_core.client_options import ClientOptions
 from google.auth import credentials as ga_credentials  # type: ignore
 from google.oauth2 import service_account  # type: ignore
-import pkg_resources
+
+from google.cloud.dataflow_v1beta3 import gapic_version as package_version
 
 try:
     OptionalRetry = Union[retries.Retry, gapic_v1.method._MethodDefault]
@@ -220,7 +221,7 @@ async def get_snapshot(
         request: Optional[Union[snapshots.GetSnapshotRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> snapshots.Snapshot:
         r"""Gets information about a snapshot.
@@ -303,7 +304,7 @@ async def delete_snapshot(
         request: Optional[Union[snapshots.DeleteSnapshotRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> snapshots.DeleteSnapshotResponse:
         r"""Deletes a snapshot.
@@ -385,7 +386,7 @@ async def list_snapshots(
         request: Optional[Union[snapshots.ListSnapshotsRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> snapshots.ListSnapshotsResponse:
         r"""Lists snapshots.
@@ -469,14 +470,9 @@ async def __aexit__(self, exc_type, exc, tb):
         await self.transport.close()
 
 
-try:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
-        gapic_version=pkg_resources.get_distribution(
-            "google-cloud-dataflow-client",
-        ).version,
-    )
-except pkg_resources.DistributionNotFound:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo()
+DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
+    gapic_version=package_version.__version__
+)
 
 
 __all__ = ("SnapshotsV1Beta3AsyncClient",)
diff --git a/google/cloud/dataflow_v1beta3/services/snapshots_v1_beta3/client.py b/google/cloud/dataflow_v1beta3/services/snapshots_v1_beta3/client.py
index 0bec061..b3fc2cc 100644
--- a/google/cloud/dataflow_v1beta3/services/snapshots_v1_beta3/client.py
+++ b/google/cloud/dataflow_v1beta3/services/snapshots_v1_beta3/client.py
@@ -38,7 +38,8 @@
 from google.auth.transport import mtls  # type: ignore
 from google.auth.transport.grpc import SslCredentials  # type: ignore
 from google.oauth2 import service_account  # type: ignore
-import pkg_resources
+
+from google.cloud.dataflow_v1beta3 import gapic_version as package_version
 
 try:
     OptionalRetry = Union[retries.Retry, gapic_v1.method._MethodDefault]
@@ -429,7 +430,7 @@ def get_snapshot(
         request: Optional[Union[snapshots.GetSnapshotRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> snapshots.Snapshot:
         r"""Gets information about a snapshot.
@@ -513,7 +514,7 @@ def delete_snapshot(
         request: Optional[Union[snapshots.DeleteSnapshotRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> snapshots.DeleteSnapshotResponse:
         r"""Deletes a snapshot.
@@ -596,7 +597,7 @@ def list_snapshots(
         request: Optional[Union[snapshots.ListSnapshotsRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> snapshots.ListSnapshotsResponse:
         r"""Lists snapshots.
@@ -688,14 +689,9 @@ def __exit__(self, type, value, traceback):
         self.transport.close()
 
 
-try:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
-        gapic_version=pkg_resources.get_distribution(
-            "google-cloud-dataflow-client",
-        ).version,
-    )
-except pkg_resources.DistributionNotFound:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo()
+DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
+    gapic_version=package_version.__version__
+)
 
 
 __all__ = ("SnapshotsV1Beta3Client",)
diff --git a/google/cloud/dataflow_v1beta3/services/snapshots_v1_beta3/transports/base.py b/google/cloud/dataflow_v1beta3/services/snapshots_v1_beta3/transports/base.py
index 798ebcf..f82725b 100644
--- a/google/cloud/dataflow_v1beta3/services/snapshots_v1_beta3/transports/base.py
+++ b/google/cloud/dataflow_v1beta3/services/snapshots_v1_beta3/transports/base.py
@@ -23,18 +23,13 @@
 import google.auth  # type: ignore
 from google.auth import credentials as ga_credentials  # type: ignore
 from google.oauth2 import service_account  # type: ignore
-import pkg_resources
 
+from google.cloud.dataflow_v1beta3 import gapic_version as package_version
 from google.cloud.dataflow_v1beta3.types import snapshots
 
-try:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
-        gapic_version=pkg_resources.get_distribution(
-            "google-cloud-dataflow-client",
-        ).version,
-    )
-except pkg_resources.DistributionNotFound:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo()
+DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
+    gapic_version=package_version.__version__
+)
 
 
 class SnapshotsV1Beta3Transport(abc.ABC):
diff --git a/google/cloud/dataflow_v1beta3/services/templates_service/async_client.py b/google/cloud/dataflow_v1beta3/services/templates_service/async_client.py
index dc0a81f..8766d74 100644
--- a/google/cloud/dataflow_v1beta3/services/templates_service/async_client.py
+++ b/google/cloud/dataflow_v1beta3/services/templates_service/async_client.py
@@ -34,7 +34,8 @@
 from google.api_core.client_options import ClientOptions
 from google.auth import credentials as ga_credentials  # type: ignore
 from google.oauth2 import service_account  # type: ignore
-import pkg_resources
+
+from google.cloud.dataflow_v1beta3 import gapic_version as package_version
 
 try:
     OptionalRetry = Union[retries.Retry, gapic_v1.method._MethodDefault]
@@ -220,7 +221,7 @@ async def create_job_from_template(
         request: Optional[Union[templates.CreateJobFromTemplateRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> jobs.Job:
         r"""Creates a Cloud Dataflow job from a template.
@@ -305,7 +306,7 @@ async def launch_template(
         request: Optional[Union[templates.LaunchTemplateRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> templates.LaunchTemplateResponse:
         r"""Launch a template.
@@ -389,7 +390,7 @@ async def get_template(
         request: Optional[Union[templates.GetTemplateRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> templates.GetTemplateResponse:
         r"""Get the template associated with a template.
@@ -476,14 +477,9 @@ async def __aexit__(self, exc_type, exc, tb):
         await self.transport.close()
 
 
-try:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
-        gapic_version=pkg_resources.get_distribution(
-            "google-cloud-dataflow-client",
-        ).version,
-    )
-except pkg_resources.DistributionNotFound:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo()
+DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
+    gapic_version=package_version.__version__
+)
 
 
 __all__ = ("TemplatesServiceAsyncClient",)
diff --git a/google/cloud/dataflow_v1beta3/services/templates_service/client.py b/google/cloud/dataflow_v1beta3/services/templates_service/client.py
index 0f4fbdf..f6e1099 100644
--- a/google/cloud/dataflow_v1beta3/services/templates_service/client.py
+++ b/google/cloud/dataflow_v1beta3/services/templates_service/client.py
@@ -38,7 +38,8 @@
 from google.auth.transport import mtls  # type: ignore
 from google.auth.transport.grpc import SslCredentials  # type: ignore
 from google.oauth2 import service_account  # type: ignore
-import pkg_resources
+
+from google.cloud.dataflow_v1beta3 import gapic_version as package_version
 
 try:
     OptionalRetry = Union[retries.Retry, gapic_v1.method._MethodDefault]
@@ -429,7 +430,7 @@ def create_job_from_template(
         request: Optional[Union[templates.CreateJobFromTemplateRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> jobs.Job:
         r"""Creates a Cloud Dataflow job from a template.
@@ -515,7 +516,7 @@ def launch_template(
         request: Optional[Union[templates.LaunchTemplateRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> templates.LaunchTemplateResponse:
         r"""Launch a template.
@@ -600,7 +601,7 @@ def get_template(
         request: Optional[Union[templates.GetTemplateRequest, dict]] = None,
         *,
         retry: OptionalRetry = gapic_v1.method.DEFAULT,
-        timeout: Optional[float] = None,
+        timeout: Union[float, object] = gapic_v1.method.DEFAULT,
         metadata: Sequence[Tuple[str, str]] = (),
     ) -> templates.GetTemplateResponse:
         r"""Get the template associated with a template.
@@ -695,14 +696,9 @@ def __exit__(self, type, value, traceback):
         self.transport.close()
 
 
-try:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
-        gapic_version=pkg_resources.get_distribution(
-            "google-cloud-dataflow-client",
-        ).version,
-    )
-except pkg_resources.DistributionNotFound:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo()
+DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
+    gapic_version=package_version.__version__
+)
 
 
 __all__ = ("TemplatesServiceClient",)
diff --git a/google/cloud/dataflow_v1beta3/services/templates_service/transports/base.py b/google/cloud/dataflow_v1beta3/services/templates_service/transports/base.py
index 008276b..d1d0691 100644
--- a/google/cloud/dataflow_v1beta3/services/templates_service/transports/base.py
+++ b/google/cloud/dataflow_v1beta3/services/templates_service/transports/base.py
@@ -23,18 +23,13 @@
 import google.auth  # type: ignore
 from google.auth import credentials as ga_credentials  # type: ignore
 from google.oauth2 import service_account  # type: ignore
-import pkg_resources
 
+from google.cloud.dataflow_v1beta3 import gapic_version as package_version
 from google.cloud.dataflow_v1beta3.types import jobs, templates
 
-try:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
-        gapic_version=pkg_resources.get_distribution(
-            "google-cloud-dataflow-client",
-        ).version,
-    )
-except pkg_resources.DistributionNotFound:
-    DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo()
+DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(
+    gapic_version=package_version.__version__
+)
 
 
 class TemplatesServiceTransport(abc.ABC):
diff --git a/release-please-config.json b/release-please-config.json
index 64ed500..4248c65 100644
--- a/release-please-config.json
+++ b/release-please-config.json
@@ -4,6 +4,7 @@
     ".": {
       "release-type": "python",
       "extra-files": [
+        "google/cloud/dataflow_v1beta3/gapic_version.py",
         "google/cloud/dataflow/gapic_version.py",
         {
           "type": "json",
diff --git a/setup.py b/setup.py
index 640e85f..b1fc892 100644
--- a/setup.py
+++ b/setup.py
@@ -36,7 +36,7 @@
     release_status = "Development Status :: 5 - Production/Stable"
 
 dependencies = [
-    "google-api-core[grpc] >= 1.33.2, <3.0.0dev,!=2.0.*,!=2.1.*,!=2.2.*,!=2.3.*,!=2.4.*,!=2.5.*,!=2.6.*,!=2.7.*",
+    "google-api-core[grpc] >= 1.34.0, <3.0.0dev,!=2.0.*,!=2.1.*,!=2.2.*,!=2.3.*,!=2.4.*,!=2.5.*,!=2.6.*,!=2.7.*,!=2.8.*,!=2.9.*,!=2.10.*",
     "proto-plus >= 1.22.0, <2.0.0dev",
     "protobuf>=3.19.5,<5.0.0dev,!=3.20.0,!=3.20.1,!=4.21.0,!=4.21.1,!=4.21.2,!=4.21.3,!=4.21.4,!=4.21.5",
 ]
diff --git a/testing/constraints-3.7.txt b/testing/constraints-3.7.txt
index 6f3158c..6c44adf 100644
--- a/testing/constraints-3.7.txt
+++ b/testing/constraints-3.7.txt
@@ -4,6 +4,6 @@
 # Pin the version to the lower bound.
 # e.g., if setup.py has "google-cloud-foo >= 1.14.0, < 2.0.0dev",
 # Then this file should have google-cloud-foo==1.14.0
-google-api-core==1.33.2
+google-api-core==1.34.0
 proto-plus==1.22.0
 protobuf==3.19.5