diff --git a/README.rst b/README.rst
index cdd19bed5..d8f28b39a 100644
--- a/README.rst
+++ b/README.rst
@@ -35,7 +35,7 @@ Note that the extras pyopenssl and enterprise_cert should not be used together b
 
 Supported Python Versions
 ^^^^^^^^^^^^^^^^^^^^^^^^^
-Python >= 3.7
+Python >= 3.6
 
 Unsupported Python Versions
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -45,9 +45,6 @@ Unsupported Python Versions
 - Python 3.5:   The last version of this library with support for Python 3.5
   was `google.auth == 1.23.0`.
 
-- Python 3.6:   The last version of this library with support for Python 3.6
-  was `google.auth == 2.22.0`.
-
 Documentation
 -------------
 
diff --git a/noxfile.py b/noxfile.py
index 4ec313407..48b0347d1 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -84,7 +84,7 @@ def mypy(session):
     session.run("mypy", "-p", "google", "-p", "tests", "-p", "tests_async")
 
 
-@nox.session(python=["3.7", "3.8", "3.9", "3.10", "3.11"])
+@nox.session(python=["3.6", "3.7", "3.8", "3.9", "3.10", "3.11"])
 def unit(session):
     constraints_path = str(
         CURRENT_DIRECTORY / "testing" / f"constraints-{session.python}.txt"
diff --git a/setup.py b/setup.py
index 922c505e6..b3c0e6de2 100644
--- a/setup.py
+++ b/setup.py
@@ -62,11 +62,12 @@
     ),
     install_requires=DEPENDENCIES,
     extras_require=extras,
-    python_requires=">=3.7",
+    python_requires=">=3.6",
     license="Apache 2.0",
     keywords="google auth oauth client",
     classifiers=[
         "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",