diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index dfd0ce3a..6c09a2fe 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -51,7 +51,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: "3.7 - 3.10"
+          python-version: "3.7 - 3.11"
           update-environment: true
 
       - name: Set __release__
@@ -96,7 +96,6 @@ jobs:
           fetch-depth: 0
 
       - name: Set up Python
-        id: py
         uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
@@ -115,7 +114,7 @@ jobs:
         run: python .github/workflows/set_cibw_build.py
 
       - name: Build wheels
-        uses: pypa/cibuildwheel@v2.11.1
+        uses: pypa/cibuildwheel@v2.11.2
         env:
           CIBW_BUILD: ${{ env.CIBW_BUILD }}
         with:
@@ -137,7 +136,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ['3.8', '3.9', '3.10']
+        python-version: ['3.8', '3.9', '3.10', '3.11']
       fail-fast: false
     timeout-minutes: 30
     steps:
@@ -148,7 +147,6 @@ jobs:
           fetch-depth: 0
 
       - name: Set up Python
-        id: py
         uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
@@ -167,7 +165,7 @@ jobs:
         run: python .github/workflows/set_cibw_build.py
 
       - name: Build wheels
-        uses: pypa/cibuildwheel@v2.11.1
+        uses: pypa/cibuildwheel@v2.11.2
         env:
           CIBW_BUILD: ${{ env.CIBW_BUILD }}
         with:
@@ -200,7 +198,7 @@ jobs:
         uses: actions/setup-python@v4
         if: startsWith(github.ref, 'refs/tags/')
         with:
-          python-version: "3.7 - 3.10"
+          python-version: "3.7 - 3.11"
           update-environment: true
 
       - name: Set __release__
@@ -246,8 +244,7 @@ jobs:
           path: dist
 
       - name: List distributions
-        run:
-          ls -lh dist/*
+        run: ls -lh dist/*
 
       - name: Publish to TestPyPI
         if: startsWith(github.ref, 'refs/tags/') || github.event_name == 'workflow_dispatch'
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 6881aa56..8e5ceb33 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -33,7 +33,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ['3.7']
+        python-version: ["3.7"]
       fail-fast: false
     timeout-minutes: 30
     steps:
@@ -44,7 +44,6 @@ jobs:
           fetch-depth: 1
 
       - name: Set up Python
-        id: py
         uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
@@ -81,7 +80,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ['3.6', '3.8', '3.9', '3.10']
+        python-version: ["3.6", "3.8", "3.9", "3.10", "3.11"]
       fail-fast: false
     timeout-minutes: 30
     steps:
@@ -92,7 +91,6 @@ jobs:
           fetch-depth: 1
 
       - name: Set up Python
-        id: py
         uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
diff --git a/README.md b/README.md
index 042e47a1..b6f4686d 100644
--- a/README.md
+++ b/README.md
@@ -173,7 +173,7 @@ There are several limitations of the pytree type registry:
 1. **The type registry is per-interpreter-dependent.** This means registering a custom type in the registry affects all modules that use OpTree. The type registry does not support per-module isolation such as namespaces.
 2. **The elements in the type registry are immutable.** Users either cannot register the same type twice (i.e., update the type registry). Nor cannot remove a type from the type registry.
 3. **Users cannot modify the behavior of already registered built-in types** listed [Built-in PyTree Node Types](#built-in-pytree-node-types), such as key order sorting for `dict` and `collections.defaultdict`.
-4. **Inherited subclasses are not implicitly registered.** The registration lookup uses `type(obj) is registered_type` rather than `isinstance(obj, registered_type)`. Users need to explicitly register all custom classes explicitly.
+4. **Inherited subclasses are not implicitly registered.** The registration lookup uses `type(obj) is registered_type` rather than `isinstance(obj, registered_type)`. Users need to register the subclasses explicitly.
 
 ### `None` is non-leaf Node vs. `None` is Leaf
 
diff --git a/pyproject.toml b/pyproject.toml
index 09cff22a..462bdbee 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,6 +30,7 @@ classifiers = [
     "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
     "Operating System :: Microsoft :: Windows",
     "Operating System :: POSIX :: Linux",
     "Operating System :: MacOS",
@@ -88,7 +89,7 @@ test-command = """make -C "{project}" test PYTHON=python"""
 safe = true
 line-length = 100
 skip-string-normalization = true
-target-version = ["py36", "py37", "py38", "py39", "py310"]
+target-version = ["py36", "py37", "py38", "py39", "py310", "py311"]
 
 [tool.isort]
 profile = "black"