diff --git a/.flake8 b/.flake8
index 29227d4..2e43874 100644
--- a/.flake8
+++ b/.flake8
@@ -16,7 +16,7 @@
 
 # Generated by synthtool. DO NOT EDIT!
 [flake8]
-ignore = E203, E266, E501, W503
+ignore = E203, E231, E266, E501, W503
 exclude =
   # Exclude generated code.
   **/proto/**
diff --git a/.github/.OwlBot.lock.yaml b/.github/.OwlBot.lock.yaml
index 44c78f7..757c9dc 100644
--- a/.github/.OwlBot.lock.yaml
+++ b/.github/.OwlBot.lock.yaml
@@ -13,4 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-python:latest
-  digest: sha256:4e1991042fe54b991db9ca17c8fb386e61b22fe4d1472a568bf0fcac85dcf5d3
+  digest: sha256:81ed5ecdfc7cac5b699ba4537376f3563f6f04122c4ec9e735d3b3dc1d43dd32
+# created: 2022-05-05T22:08:23.383410683Z
diff --git a/.github/auto-approve.yml b/.github/auto-approve.yml
new file mode 100644
index 0000000..311ebbb
--- /dev/null
+++ b/.github/auto-approve.yml
@@ -0,0 +1,3 @@
+# https://github.com/googleapis/repo-automation-bots/tree/main/packages/auto-approve
+processes:
+  - "OwlBotTemplateChanges"
diff --git a/.github/auto-label.yaml b/.github/auto-label.yaml
new file mode 100644
index 0000000..41bff0b
--- /dev/null
+++ b/.github/auto-label.yaml
@@ -0,0 +1,15 @@
+# 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.
+requestsize:
+  enabled: true
diff --git a/.github/release-please.yml b/.github/release-please.yml
index 466597e..6def37a 100644
--- a/.github/release-please.yml
+++ b/.github/release-please.yml
@@ -1,2 +1,8 @@
 releaseType: python
 handleGHRelease: true
+# NOTE: this section is generated by synthtool.languages.python
+# See https://github.com/googleapis/synthtool/blob/master/synthtool/languages/python.py
+branches:
+- branch: v0
+  handleGHRelease: true
+  releaseType: python
diff --git a/.kokoro/docker/docs/Dockerfile b/.kokoro/docker/docs/Dockerfile
index 4e1b1fb..238b87b 100644
--- a/.kokoro/docker/docs/Dockerfile
+++ b/.kokoro/docker/docs/Dockerfile
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from ubuntu:20.04
+from ubuntu:22.04
 
 ENV DEBIAN_FRONTEND noninteractive
 
@@ -60,8 +60,24 @@ RUN apt-get update \
   && rm -rf /var/lib/apt/lists/* \
   && rm -f /var/cache/apt/archives/*.deb
 
+###################### Install python 3.8.11
+
+# Download python 3.8.11
+RUN wget https://www.python.org/ftp/python/3.8.11/Python-3.8.11.tgz
+
+# Extract files
+RUN tar -xvf Python-3.8.11.tgz
+
+# Install python 3.8.11
+RUN ./Python-3.8.11/configure --enable-optimizations
+RUN make altinstall
+
+###################### Install pip
 RUN wget -O /tmp/get-pip.py 'https://bootstrap.pypa.io/get-pip.py' \
-  && python3.8 /tmp/get-pip.py \
+  && python3 /tmp/get-pip.py \
   && rm /tmp/get-pip.py
 
+# Test pip
+RUN python3 -m pip
+
 CMD ["python3.8"]
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 62eb5a7..46d2371 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -22,7 +22,7 @@ repos:
     -   id: end-of-file-fixer
     -   id: check-yaml
 -   repo: https://github.com/psf/black
-    rev: 19.10b0
+    rev: 22.3.0
     hooks:
     - id: black
 -   repo: https://gitlab.com/pycqa/flake8
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6de7bbf..cbfc0dc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,18 @@
 # Changelog
 
-### [1.1.1](https://github.com/googleapis/python-appengine-logging/compare/v1.1.0...v1.1.1) (2022-03-05)
+## [1.1.2](https://github.com/googleapis/python-appengine-logging/compare/v1.1.1...v1.1.2) (2022-06-03)
+
+
+### Bug Fixes
+
+* **deps:** require protobuf <4.0.0dev ([#95](https://github.com/googleapis/python-appengine-logging/issues/95)) ([ad0bcd2](https://github.com/googleapis/python-appengine-logging/commit/ad0bcd219d1d5d976529d49ef8ade36fde7e32ce))
+
+
+### Documentation
+
+* fix changelog header to consistent size ([#96](https://github.com/googleapis/python-appengine-logging/issues/96)) ([4c01656](https://github.com/googleapis/python-appengine-logging/commit/4c016568df4a5abc145daae1ae4448535181f4ff))
+
+## [1.1.1](https://github.com/googleapis/python-appengine-logging/compare/v1.1.0...v1.1.1) (2022-03-05)
 
 
 ### Bug Fixes
@@ -28,14 +40,14 @@
 
 * add context manager support in client ([#44](https://www.github.com/googleapis/python-appengine-logging/issues/44)) ([9d23c02](https://www.github.com/googleapis/python-appengine-logging/commit/9d23c02d043cf4c569e445eb13db5f78207fbaa7))
 
-### [0.1.5](https://www.github.com/googleapis/python-appengine-logging/compare/v0.1.4...v0.1.5) (2021-09-24)
+## [0.1.5](https://www.github.com/googleapis/python-appengine-logging/compare/v0.1.4...v0.1.5) (2021-09-24)
 
 
 ### Bug Fixes
 
 * add 'dict' annotation type to 'request' ([35fa951](https://www.github.com/googleapis/python-appengine-logging/commit/35fa951f775931caefacf0b7dadd37610aad9354))
 
-### [0.1.4](https://www.github.com/googleapis/python-appengine-logging/compare/v0.1.3...v0.1.4) (2021-07-29)
+## [0.1.4](https://www.github.com/googleapis/python-appengine-logging/compare/v0.1.3...v0.1.4) (2021-07-29)
 
 
 ### Documentation
@@ -47,21 +59,21 @@
 
 * release as 0.1.4 ([#24](https://www.github.com/googleapis/python-appengine-logging/issues/24)) ([5aa924e](https://www.github.com/googleapis/python-appengine-logging/commit/5aa924e0a24a94cf259168cc1dd5aa65dc0f40a9))
 
-### [0.1.3](https://www.github.com/googleapis/python-appengine-logging/compare/v0.1.2...v0.1.3) (2021-07-21)
+## [0.1.3](https://www.github.com/googleapis/python-appengine-logging/compare/v0.1.2...v0.1.3) (2021-07-21)
 
 
 ### Bug Fixes
 
 * **deps:** pin 'google-{api,cloud}-core', 'google-auth' to allow 2.x versions ([#18](https://www.github.com/googleapis/python-appengine-logging/issues/18)) ([6f49270](https://www.github.com/googleapis/python-appengine-logging/commit/6f492709a55926c7b993da7bb26469fc0bf79128))
 
-### [0.1.2](https://www.github.com/googleapis/python-appengine-logging/compare/v0.1.1...v0.1.2) (2021-07-14)
+## [0.1.2](https://www.github.com/googleapis/python-appengine-logging/compare/v0.1.1...v0.1.2) (2021-07-14)
 
 
 ### Documentation
 
 * omit mention of Python 2.7 in 'CONTRIBUTING.rst' ([#1127](https://www.github.com/googleapis/python-appengine-logging/issues/1127)) ([#8](https://www.github.com/googleapis/python-appengine-logging/issues/8)) ([f1bd0a3](https://www.github.com/googleapis/python-appengine-logging/commit/f1bd0a3d2d068fae0c6d9c167a25908b6f808997)), closes [#1126](https://www.github.com/googleapis/python-appengine-logging/issues/1126)
 
-### [0.1.1](https://www.github.com/googleapis/python-appengine-logging/compare/v0.1.0...v0.1.1) (2021-06-16)
+## [0.1.1](https://www.github.com/googleapis/python-appengine-logging/compare/v0.1.0...v0.1.1) (2021-06-16)
 
 
 ### Bug Fixes
diff --git a/docs/conf.py b/docs/conf.py
index 070404e..a2e84d6 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -24,9 +24,9 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
-import sys
 import os
 import shlex
+import sys
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
@@ -361,7 +361,10 @@
 intersphinx_mapping = {
     "python": ("https://python.readthedocs.org/en/latest/", None),
     "google-auth": ("https://googleapis.dev/python/google-auth/latest/", None),
-    "google.api_core": ("https://googleapis.dev/python/google-api-core/latest/", None,),
+    "google.api_core": (
+        "https://googleapis.dev/python/google-api-core/latest/",
+        None,
+    ),
     "grpc": ("https://grpc.github.io/grpc/python/", None),
     "proto-plus": ("https://proto-plus-python.readthedocs.io/en/latest/", None),
     "protobuf": ("https://googleapis.dev/python/protobuf/latest/", None),
diff --git a/google/cloud/appengine_logging/__init__.py b/google/cloud/appengine_logging/__init__.py
index ee2818e..f5cb6cc 100644
--- a/google/cloud/appengine_logging/__init__.py
+++ b/google/cloud/appengine_logging/__init__.py
@@ -15,10 +15,12 @@
 #
 
 
-from google.cloud.appengine_logging_v1.types.request_log import LogLine
-from google.cloud.appengine_logging_v1.types.request_log import RequestLog
-from google.cloud.appengine_logging_v1.types.request_log import SourceLocation
-from google.cloud.appengine_logging_v1.types.request_log import SourceReference
+from google.cloud.appengine_logging_v1.types.request_log import (
+    LogLine,
+    RequestLog,
+    SourceLocation,
+    SourceReference,
+)
 
 __all__ = (
     "LogLine",
diff --git a/google/cloud/appengine_logging_v1/__init__.py b/google/cloud/appengine_logging_v1/__init__.py
index db01b11..1acb51d 100644
--- a/google/cloud/appengine_logging_v1/__init__.py
+++ b/google/cloud/appengine_logging_v1/__init__.py
@@ -15,10 +15,7 @@
 #
 
 
-from .types.request_log import LogLine
-from .types.request_log import RequestLog
-from .types.request_log import SourceLocation
-from .types.request_log import SourceReference
+from .types.request_log import LogLine, RequestLog, SourceLocation, SourceReference
 
 __all__ = (
     "LogLine",
diff --git a/google/cloud/appengine_logging_v1/types/__init__.py b/google/cloud/appengine_logging_v1/types/__init__.py
index 6f03b6e..02719c9 100644
--- a/google/cloud/appengine_logging_v1/types/__init__.py
+++ b/google/cloud/appengine_logging_v1/types/__init__.py
@@ -13,12 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-from .request_log import (
-    LogLine,
-    RequestLog,
-    SourceLocation,
-    SourceReference,
-)
+from .request_log import LogLine, RequestLog, SourceLocation, SourceReference
 
 __all__ = (
     "LogLine",
diff --git a/google/cloud/appengine_logging_v1/types/request_log.py b/google/cloud/appengine_logging_v1/types/request_log.py
index 2982d16..c3fb22d 100644
--- a/google/cloud/appengine_logging_v1/types/request_log.py
+++ b/google/cloud/appengine_logging_v1/types/request_log.py
@@ -13,16 +13,19 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-import proto  # type: ignore
-
 from google.logging.type import log_severity_pb2  # type: ignore
 from google.protobuf import duration_pb2  # type: ignore
 from google.protobuf import timestamp_pb2  # type: ignore
-
+import proto  # type: ignore
 
 __protobuf__ = proto.module(
     package="google.appengine.logging.v1",
-    manifest={"LogLine", "SourceLocation", "SourceReference", "RequestLog",},
+    manifest={
+        "LogLine",
+        "SourceLocation",
+        "SourceReference",
+        "RequestLog",
+    },
 )
 
 
@@ -42,10 +45,25 @@ class LogLine(proto.Message):
             written.
     """
 
-    time = proto.Field(proto.MESSAGE, number=1, message=timestamp_pb2.Timestamp,)
-    severity = proto.Field(proto.ENUM, number=2, enum=log_severity_pb2.LogSeverity,)
-    log_message = proto.Field(proto.STRING, number=3,)
-    source_location = proto.Field(proto.MESSAGE, number=4, message="SourceLocation",)
+    time = proto.Field(
+        proto.MESSAGE,
+        number=1,
+        message=timestamp_pb2.Timestamp,
+    )
+    severity = proto.Field(
+        proto.ENUM,
+        number=2,
+        enum=log_severity_pb2.LogSeverity,
+    )
+    log_message = proto.Field(
+        proto.STRING,
+        number=3,
+    )
+    source_location = proto.Field(
+        proto.MESSAGE,
+        number=4,
+        message="SourceLocation",
+    )
 
 
 class SourceLocation(proto.Message):
@@ -68,9 +86,18 @@ class SourceLocation(proto.Message):
             (Go), ``function`` (Python).
     """
 
-    file = proto.Field(proto.STRING, number=1,)
-    line = proto.Field(proto.INT64, number=2,)
-    function_name = proto.Field(proto.STRING, number=3,)
+    file = proto.Field(
+        proto.STRING,
+        number=1,
+    )
+    line = proto.Field(
+        proto.INT64,
+        number=2,
+    )
+    function_name = proto.Field(
+        proto.STRING,
+        number=3,
+    )
 
 
 class SourceReference(proto.Message):
@@ -88,8 +115,14 @@ class SourceReference(proto.Message):
             "0035781c50ec7aa23385dc841529ce8a4b70db1b".
     """
 
-    repository = proto.Field(proto.STRING, number=1,)
-    revision_id = proto.Field(proto.STRING, number=2,)
+    repository = proto.Field(
+        proto.STRING,
+        number=1,
+    )
+    revision_id = proto.Field(
+        proto.STRING,
+        number=2,
+    )
 
 
 class RequestLog(proto.Message):
@@ -205,40 +238,143 @@ class RequestLog(proto.Message):
             code is distributed among multiple repositories.
     """
 
-    app_id = proto.Field(proto.STRING, number=1,)
-    module_id = proto.Field(proto.STRING, number=37,)
-    version_id = proto.Field(proto.STRING, number=2,)
-    request_id = proto.Field(proto.STRING, number=3,)
-    ip = proto.Field(proto.STRING, number=4,)
-    start_time = proto.Field(proto.MESSAGE, number=6, message=timestamp_pb2.Timestamp,)
-    end_time = proto.Field(proto.MESSAGE, number=7, message=timestamp_pb2.Timestamp,)
-    latency = proto.Field(proto.MESSAGE, number=8, message=duration_pb2.Duration,)
-    mega_cycles = proto.Field(proto.INT64, number=9,)
-    method = proto.Field(proto.STRING, number=10,)
-    resource = proto.Field(proto.STRING, number=11,)
-    http_version = proto.Field(proto.STRING, number=12,)
-    status = proto.Field(proto.INT32, number=13,)
-    response_size = proto.Field(proto.INT64, number=14,)
-    referrer = proto.Field(proto.STRING, number=15,)
-    user_agent = proto.Field(proto.STRING, number=16,)
-    nickname = proto.Field(proto.STRING, number=40,)
-    url_map_entry = proto.Field(proto.STRING, number=17,)
-    host = proto.Field(proto.STRING, number=20,)
-    cost = proto.Field(proto.DOUBLE, number=21,)
-    task_queue_name = proto.Field(proto.STRING, number=22,)
-    task_name = proto.Field(proto.STRING, number=23,)
-    was_loading_request = proto.Field(proto.BOOL, number=24,)
-    pending_time = proto.Field(proto.MESSAGE, number=25, message=duration_pb2.Duration,)
-    instance_index = proto.Field(proto.INT32, number=26,)
-    finished = proto.Field(proto.BOOL, number=27,)
-    first = proto.Field(proto.BOOL, number=42,)
-    instance_id = proto.Field(proto.STRING, number=28,)
-    line = proto.RepeatedField(proto.MESSAGE, number=29, message="LogLine",)
-    app_engine_release = proto.Field(proto.STRING, number=38,)
-    trace_id = proto.Field(proto.STRING, number=39,)
-    trace_sampled = proto.Field(proto.BOOL, number=43,)
+    app_id = proto.Field(
+        proto.STRING,
+        number=1,
+    )
+    module_id = proto.Field(
+        proto.STRING,
+        number=37,
+    )
+    version_id = proto.Field(
+        proto.STRING,
+        number=2,
+    )
+    request_id = proto.Field(
+        proto.STRING,
+        number=3,
+    )
+    ip = proto.Field(
+        proto.STRING,
+        number=4,
+    )
+    start_time = proto.Field(
+        proto.MESSAGE,
+        number=6,
+        message=timestamp_pb2.Timestamp,
+    )
+    end_time = proto.Field(
+        proto.MESSAGE,
+        number=7,
+        message=timestamp_pb2.Timestamp,
+    )
+    latency = proto.Field(
+        proto.MESSAGE,
+        number=8,
+        message=duration_pb2.Duration,
+    )
+    mega_cycles = proto.Field(
+        proto.INT64,
+        number=9,
+    )
+    method = proto.Field(
+        proto.STRING,
+        number=10,
+    )
+    resource = proto.Field(
+        proto.STRING,
+        number=11,
+    )
+    http_version = proto.Field(
+        proto.STRING,
+        number=12,
+    )
+    status = proto.Field(
+        proto.INT32,
+        number=13,
+    )
+    response_size = proto.Field(
+        proto.INT64,
+        number=14,
+    )
+    referrer = proto.Field(
+        proto.STRING,
+        number=15,
+    )
+    user_agent = proto.Field(
+        proto.STRING,
+        number=16,
+    )
+    nickname = proto.Field(
+        proto.STRING,
+        number=40,
+    )
+    url_map_entry = proto.Field(
+        proto.STRING,
+        number=17,
+    )
+    host = proto.Field(
+        proto.STRING,
+        number=20,
+    )
+    cost = proto.Field(
+        proto.DOUBLE,
+        number=21,
+    )
+    task_queue_name = proto.Field(
+        proto.STRING,
+        number=22,
+    )
+    task_name = proto.Field(
+        proto.STRING,
+        number=23,
+    )
+    was_loading_request = proto.Field(
+        proto.BOOL,
+        number=24,
+    )
+    pending_time = proto.Field(
+        proto.MESSAGE,
+        number=25,
+        message=duration_pb2.Duration,
+    )
+    instance_index = proto.Field(
+        proto.INT32,
+        number=26,
+    )
+    finished = proto.Field(
+        proto.BOOL,
+        number=27,
+    )
+    first = proto.Field(
+        proto.BOOL,
+        number=42,
+    )
+    instance_id = proto.Field(
+        proto.STRING,
+        number=28,
+    )
+    line = proto.RepeatedField(
+        proto.MESSAGE,
+        number=29,
+        message="LogLine",
+    )
+    app_engine_release = proto.Field(
+        proto.STRING,
+        number=38,
+    )
+    trace_id = proto.Field(
+        proto.STRING,
+        number=39,
+    )
+    trace_sampled = proto.Field(
+        proto.BOOL,
+        number=43,
+    )
     source_reference = proto.RepeatedField(
-        proto.MESSAGE, number=41, message="SourceReference",
+        proto.MESSAGE,
+        number=41,
+        message="SourceReference",
     )
 
 
diff --git a/noxfile.py b/noxfile.py
index 2a2001c..7c1742d 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -17,19 +17,45 @@
 # Generated by synthtool. DO NOT EDIT!
 
 from __future__ import absolute_import
+
 import os
 import pathlib
 import shutil
+import warnings
 
 import nox
 
-
-BLACK_VERSION = "black==19.10b0"
-BLACK_PATHS = ["docs", "google", "tests", "noxfile.py", "setup.py"]
+BLACK_VERSION = "black==22.3.0"
+ISORT_VERSION = "isort==5.10.1"
+LINT_PATHS = ["docs", "google", "tests", "noxfile.py", "setup.py"]
 
 DEFAULT_PYTHON_VERSION = "3.8"
-SYSTEM_TEST_PYTHON_VERSIONS = ["3.8"]
+
 UNIT_TEST_PYTHON_VERSIONS = ["3.6", "3.7", "3.8", "3.9", "3.10"]
+UNIT_TEST_STANDARD_DEPENDENCIES = [
+    "mock",
+    "asyncmock",
+    "pytest",
+    "pytest-cov",
+    "pytest-asyncio",
+]
+UNIT_TEST_EXTERNAL_DEPENDENCIES = []
+UNIT_TEST_LOCAL_DEPENDENCIES = []
+UNIT_TEST_DEPENDENCIES = []
+UNIT_TEST_EXTRAS = []
+UNIT_TEST_EXTRAS_BY_PYTHON = {}
+
+SYSTEM_TEST_PYTHON_VERSIONS = ["3.8"]
+SYSTEM_TEST_STANDARD_DEPENDENCIES = [
+    "mock",
+    "pytest",
+    "google-cloud-testutils",
+]
+SYSTEM_TEST_EXTERNAL_DEPENDENCIES = []
+SYSTEM_TEST_LOCAL_DEPENDENCIES = []
+SYSTEM_TEST_DEPENDENCIES = []
+SYSTEM_TEST_EXTRAS = []
+SYSTEM_TEST_EXTRAS_BY_PYTHON = {}
 
 CURRENT_DIRECTORY = pathlib.Path(__file__).parent.absolute()
 
@@ -57,7 +83,9 @@ def lint(session):
     """
     session.install("flake8", BLACK_VERSION)
     session.run(
-        "black", "--check", *BLACK_PATHS,
+        "black",
+        "--check",
+        *LINT_PATHS,
     )
     session.run("flake8", "google", "tests")
 
@@ -67,7 +95,28 @@ def blacken(session):
     """Run black. Format code to uniform standard."""
     session.install(BLACK_VERSION)
     session.run(
-        "black", *BLACK_PATHS,
+        "black",
+        *LINT_PATHS,
+    )
+
+
+@nox.session(python=DEFAULT_PYTHON_VERSION)
+def format(session):
+    """
+    Run isort to sort imports. Then run black
+    to format code to uniform standard.
+    """
+    session.install(BLACK_VERSION, ISORT_VERSION)
+    # Use the --fss option to sort imports using strict alphabetical order.
+    # See https://pycqa.github.io/isort/docs/configuration/options.html#force-sort-within-sections
+    session.run(
+        "isort",
+        "--fss",
+        *LINT_PATHS,
+    )
+    session.run(
+        "black",
+        *LINT_PATHS,
     )
 
 
@@ -78,23 +127,41 @@ def lint_setup_py(session):
     session.run("python", "setup.py", "check", "--restructuredtext", "--strict")
 
 
+def install_unittest_dependencies(session, *constraints):
+    standard_deps = UNIT_TEST_STANDARD_DEPENDENCIES + UNIT_TEST_DEPENDENCIES
+    session.install(*standard_deps, *constraints)
+
+    if UNIT_TEST_EXTERNAL_DEPENDENCIES:
+        warnings.warn(
+            "'unit_test_external_dependencies' is deprecated. Instead, please "
+            "use 'unit_test_dependencies' or 'unit_test_local_dependencies'.",
+            DeprecationWarning,
+        )
+        session.install(*UNIT_TEST_EXTERNAL_DEPENDENCIES, *constraints)
+
+    if UNIT_TEST_LOCAL_DEPENDENCIES:
+        session.install(*UNIT_TEST_LOCAL_DEPENDENCIES, *constraints)
+
+    if UNIT_TEST_EXTRAS_BY_PYTHON:
+        extras = UNIT_TEST_EXTRAS_BY_PYTHON.get(session.python, [])
+    elif UNIT_TEST_EXTRAS:
+        extras = UNIT_TEST_EXTRAS
+    else:
+        extras = []
+
+    if extras:
+        session.install("-e", f".[{','.join(extras)}]", *constraints)
+    else:
+        session.install("-e", ".", *constraints)
+
+
 def default(session):
     # Install all test dependencies, then install this package in-place.
 
     constraints_path = str(
         CURRENT_DIRECTORY / "testing" / f"constraints-{session.python}.txt"
     )
-    session.install(
-        "mock",
-        "asyncmock",
-        "pytest",
-        "pytest-cov",
-        "pytest-asyncio",
-        "-c",
-        constraints_path,
-    )
-
-    session.install("-e", ".", "-c", constraints_path)
+    install_unittest_dependencies(session, "-c", constraints_path)
 
     # Run py.test against the unit tests.
     session.run(
@@ -118,6 +185,35 @@ def unit(session):
     default(session)
 
 
+def install_systemtest_dependencies(session, *constraints):
+
+    # Use pre-release gRPC for system tests.
+    session.install("--pre", "grpcio")
+
+    session.install(*SYSTEM_TEST_STANDARD_DEPENDENCIES, *constraints)
+
+    if SYSTEM_TEST_EXTERNAL_DEPENDENCIES:
+        session.install(*SYSTEM_TEST_EXTERNAL_DEPENDENCIES, *constraints)
+
+    if SYSTEM_TEST_LOCAL_DEPENDENCIES:
+        session.install("-e", *SYSTEM_TEST_LOCAL_DEPENDENCIES, *constraints)
+
+    if SYSTEM_TEST_DEPENDENCIES:
+        session.install("-e", *SYSTEM_TEST_DEPENDENCIES, *constraints)
+
+    if SYSTEM_TEST_EXTRAS_BY_PYTHON:
+        extras = SYSTEM_TEST_EXTRAS_BY_PYTHON.get(session.python, [])
+    elif SYSTEM_TEST_EXTRAS:
+        extras = SYSTEM_TEST_EXTRAS
+    else:
+        extras = []
+
+    if extras:
+        session.install("-e", f".[{','.join(extras)}]", *constraints)
+    else:
+        session.install("-e", ".", *constraints)
+
+
 @nox.session(python=SYSTEM_TEST_PYTHON_VERSIONS)
 def system(session):
     """Run the system test suite."""
@@ -140,13 +236,7 @@ def system(session):
     if not system_test_exists and not system_test_folder_exists:
         session.skip("System tests were not found")
 
-    # Use pre-release gRPC for system tests.
-    session.install("--pre", "grpcio")
-
-    # Install all test dependencies, then install this package into the
-    # virtualenv's dist-packages.
-    session.install("mock", "pytest", "google-cloud-testutils", "-c", constraints_path)
-    session.install("-e", ".", "-c", constraints_path)
+    install_systemtest_dependencies(session, "-c", constraints_path)
 
     # Run py.test against the system tests.
     if system_test_exists:
diff --git a/scripts/readme-gen/readme_gen.py b/scripts/readme-gen/readme_gen.py
index d309d6e..91b5967 100644
--- a/scripts/readme-gen/readme_gen.py
+++ b/scripts/readme-gen/readme_gen.py
@@ -28,7 +28,10 @@
 jinja_env = jinja2.Environment(
     trim_blocks=True,
     loader=jinja2.FileSystemLoader(
-        os.path.abspath(os.path.join(os.path.dirname(__file__), 'templates'))))
+        os.path.abspath(os.path.join(os.path.dirname(__file__), "templates"))
+    ),
+    autoescape=True,
+)
 
 README_TMPL = jinja_env.get_template('README.tmpl.rst')
 
diff --git a/setup.py b/setup.py
index 769349d..89729ec 100644
--- a/setup.py
+++ b/setup.py
@@ -15,9 +15,10 @@
 #
 import io
 import os
+
 import setuptools  # type: ignore
 
-version = "1.1.1"
+version = "1.1.2"
 
 package_root = os.path.abspath(os.path.dirname(__file__))
 
@@ -46,8 +47,8 @@
         # Until this issue is closed
         # https://github.com/googleapis/google-cloud-python/issues/10566
         "google-api-core[grpc] >= 1.31.5, <3.0.0dev,!=2.0.*,!=2.1.*,!=2.2.*,!=2.3.0",
-        "proto-plus >= 1.15.0",
-        "packaging >= 14.3",
+        "proto-plus >= 1.15.0, <2.0.0dev",
+        "protobuf >= 3.19.0, <4.0.0dev",
     ),
     python_requires=">=3.6",
     classifiers=[
diff --git a/testing/constraints-3.6.txt b/testing/constraints-3.6.txt
index 766f288..ec8ca20 100644
--- a/testing/constraints-3.6.txt
+++ b/testing/constraints-3.6.txt
@@ -7,4 +7,4 @@
 # Then this file should have foo==1.14.0
 google-api-core==1.31.5
 proto-plus==1.15.0
-packaging==14.3
+protobuf==3.19.0
diff --git a/testing/constraints-3.7.txt b/testing/constraints-3.7.txt
index e69de29..ec8ca20 100644
--- a/testing/constraints-3.7.txt
+++ b/testing/constraints-3.7.txt
@@ -0,0 +1,10 @@
+# This constraints file is used to check that lower bounds
+# are correct in setup.py
+# List *all* library dependencies and extras in this file.
+# Pin the version to the lower bound.
+#
+# e.g., if setup.py has "foo >= 1.14.0, < 2.0.0dev",
+# Then this file should have foo==1.14.0
+google-api-core==1.31.5
+proto-plus==1.15.0
+protobuf==3.19.0