diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a98a70e..70044a7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,7 +18,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10", "pypy3.9"]  # "3.11-dev"
+        python-version: ["3.7", "3.8", "3.9", "3.10", "pypy3.9", "3.11"] # "3.12-dev"
 
     steps:
       - uses: actions/checkout@v3
diff --git a/requirements/dev.pip b/requirements/dev.pip
index 38d8d13..ce980f0 100644
--- a/requirements/dev.pip
+++ b/requirements/dev.pip
@@ -6,6 +6,6 @@
 -r exe.pip
 -r test.pip
 
-black
+black==22.12.*
 docopt  # For `/bin/bumpver.py`.
 mypy; implementation_name == 'cpython'