diff --git a/.github/.OwlBot.lock.yaml b/.github/.OwlBot.lock.yaml
index ea06d39..cc49c6a 100644
--- a/.github/.OwlBot.lock.yaml
+++ b/.github/.OwlBot.lock.yaml
@@ -1,3 +1,3 @@
 docker:
   image: gcr.io/repo-automation-bots/owlbot-python:latest
-  digest: sha256:58c7342b0bccf85028100adaa3d856cb4a871c22ca9c01960d996e66c40548ce
+  digest: sha256:b6169fc6a5207b11800a7c002d0c5c2bc6d82697185ca12e666f44031468cfcd
diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index ed30c58..986a58a 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -69,7 +69,6 @@ We use `nox <https://nox.readthedocs.io/en/latest/>`__ to instrument our tests.
 
 - To test your changes, run unit tests with ``nox``::
 
-    $ nox -s unit-2.7
     $ nox -s unit-3.8
     $ ...
 
@@ -144,7 +143,6 @@ Running System Tests
 
    # Run all system tests
    $ nox -s system-3.8
-   $ nox -s system-2.7
 
    # Run a single system test
    $ nox -s system-3.8 -- -k <name of test>
@@ -152,9 +150,8 @@ Running System Tests
 
   .. note::
 
-      System tests are only configured to run under Python 2.7 and
-      Python 3.8. For expediency, we do not run them in older versions
-      of Python 3.
+      System tests are only configured to run under Python 3.8.
+      For expediency, we do not run them in older versions of Python 3.
 
   This alone will not run the tests. You'll need to change some local
   auth settings and change some configuration in your project to
diff --git a/README.rst b/README.rst
index 1ddb857..5632026 100644
--- a/README.rst
+++ b/README.rst
@@ -52,12 +52,7 @@ dependencies.
 
 Supported Python Versions
 ^^^^^^^^^^^^^^^^^^^^^^^^^
-Python >= 3.5
-
-Deprecated Python Versions
-^^^^^^^^^^^^^^^^^^^^^^^^^^
-Python == 2.7. Python 2.7 support will be removed on January 1, 2020.
-
+Python >= 3.6
 
 Mac/Linux
 ^^^^^^^^^
diff --git a/noxfile.py b/noxfile.py
index 7fe285d..d896e7f 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -28,8 +28,8 @@
 BLACK_PATHS = ["docs", "google", "tests", "noxfile.py", "setup.py"]
 
 DEFAULT_PYTHON_VERSION = "3.8"
-SYSTEM_TEST_PYTHON_VERSIONS = ["2.7", "3.8"]
-UNIT_TEST_PYTHON_VERSIONS = ["2.7", "3.6", "3.7", "3.8", "3.9"]
+SYSTEM_TEST_PYTHON_VERSIONS = ["3.8"]
+UNIT_TEST_PYTHON_VERSIONS = ["3.6", "3.7", "3.8", "3.9"]
 
 CURRENT_DIRECTORY = pathlib.Path(__file__).parent.absolute()
 
@@ -84,6 +84,8 @@ def default(session):
     constraints_path = str(
         CURRENT_DIRECTORY / "testing" / f"constraints-{session.python}.txt"
     )
+    session.install("asyncmock", "pytest-asyncio", "-c", constraints_path)
+
     session.install("mock", "pytest", "pytest-cov", "-c", constraints_path)
 
     session.install("-e", ".", "-c", constraints_path)
@@ -167,7 +169,7 @@ def cover(session):
     test runs (not system test runs), and then erases coverage data.
     """
     session.install("coverage", "pytest-cov")
-    session.run("coverage", "report", "--show-missing", "--fail-under=97")
+    session.run("coverage", "report", "--show-missing", "--fail-under=100")
 
     session.run("coverage", "erase")
 
diff --git a/owlbot.py b/owlbot.py
index 60a18bd..8983c1c 100644
--- a/owlbot.py
+++ b/owlbot.py
@@ -24,7 +24,7 @@
 # ----------------------------------------------------------------------------
 # Add templated files
 # ----------------------------------------------------------------------------
-templated_files = common.py_library(cov_level=97)
+templated_files = common.py_library(microgenerator=True)
 # this is an http library, not grpc
 s.move(templated_files, excludes=["docs/multiprocessing.rst"])
 
diff --git a/setup.py b/setup.py
index 001e13e..4c08987 100644
--- a/setup.py
+++ b/setup.py
@@ -66,12 +66,11 @@
         "Intended Audience :: Developers",
         "License :: OSI Approved :: Apache Software License",
         "Programming Language :: Python",
-        "Programming Language :: Python :: 2",
-        "Programming Language :: Python :: 2.7",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
         "Operating System :: OS Independent",
         "Topic :: Internet",
     ],
@@ -80,7 +79,7 @@
     namespace_packages=namespaces,
     install_requires=dependencies,
     extras_require=extras,
-    python_requires=">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*",
+    python_requires=">=3.6",
     include_package_data=True,
     zip_safe=False,
 )