diff --git a/CHANGES/6857.misc b/CHANGES/6857.misc
new file mode 100644
index 00000000000..3af5791308c
--- /dev/null
+++ b/CHANGES/6857.misc
@@ -0,0 +1,2 @@
+Excluded :term:`cchardet` from the ``speedups`` extra in the package
+metadata under Python 3.10 or higher -- by :user:`webknjaz`.
diff --git a/docs/_snippets/cchardet-unmaintained-admonition.rst b/docs/_snippets/cchardet-unmaintained-admonition.rst
new file mode 100644
index 00000000000..ec290e0e954
--- /dev/null
+++ b/docs/_snippets/cchardet-unmaintained-admonition.rst
@@ -0,0 +1,5 @@
+.. warning::
+
+   Note that the :term:`cchardet` project is known not to support
+   Python 3.10 or higher. See :issue:`6819` and
+   :gh:`PyYoshi/cChardet/issues/77` for more details.
diff --git a/docs/glossary.rst b/docs/glossary.rst
index 42b063a95e0..65121851dda 100644
--- a/docs/glossary.rst
+++ b/docs/glossary.rst
@@ -46,6 +46,8 @@
 
        https://pypi.python.org/pypi/cchardet/
 
+       .. include:: _snippets/cchardet-unmaintained-admonition.rst
+
    gunicorn
 
        Gunicorn 'Green Unicorn' is a Python WSGI HTTP Server for
diff --git a/docs/index.rst b/docs/index.rst
index 024438b6b87..bc4d6d4bf1f 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -40,6 +40,8 @@ replacement for :term:`charset-normalizer`:
 
    $ pip install cchardet
 
+.. include:: _snippets/cchardet-unmaintained-admonition.rst
+
 For speeding up DNS resolving by client API you may install
 :term:`aiodns` as well.
 This option is highly recommended:
diff --git a/requirements/base.txt b/requirements/base.txt
index 9c06faa562b..1890caa64f7 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -8,7 +8,7 @@ async-timeout==4.0.2
 asynctest==0.13.0; python_version<"3.8"
 attrs==21.4.0
 Brotli==1.0.9
-cchardet==2.1.7
+cchardet==2.1.7; python_version < "3.10"  # Unmaintained: aio-libs/aiohttp#6819
 charset-normalizer==2.0.12
 frozenlist==1.3.1
 gunicorn==20.1.0
diff --git a/setup.cfg b/setup.cfg
index 541c1788627..b307755abb2 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -68,7 +68,7 @@ install_requires =
 speedups =
   aiodns
   Brotli
-  cchardet
+  cchardet; python_version < "3.10"
 
 [options.packages.find]
 exclude =