diff --git a/.github/actions/setup/action.yml b/.github/actions/setup/action.yml
index 1f3fc51..ed27eaa 100644
--- a/.github/actions/setup/action.yml
+++ b/.github/actions/setup/action.yml
@@ -6,7 +6,7 @@ inputs:
   python_version:
     description: The Python version.
     required: false
-    default: '3.11.1'
+    default: '3.11'
   poetry_version:
     description: The Poetry version.
     required: false
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 515dff6..f5b1a57 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -10,30 +10,54 @@ jobs:
   test:
     runs-on: ubuntu-latest
     timeout-minutes: 30
+    strategy:
+      fail-fast: false
+      matrix:
+        python:
+          - '3.10'
+          - '3.11'
     steps:
       - name: Checkout
         uses: actions/checkout@v3
       - name: Setup
         uses: ./.github/actions/setup
+        with:
+          python_version: ${{ matrix.python }}
       - name: Test
         run: make test
   lint:
     runs-on: ubuntu-latest
     timeout-minutes: 30
+    strategy:
+      fail-fast: false
+      matrix:
+        python:
+          - '3.10'
+          - '3.11'
     steps:
       - name: Checkout
         uses: actions/checkout@v3
       - name: Setup
         uses: ./.github/actions/setup
+        with:
+          python_version: ${{ matrix.python }}
       - name: Lint
         run: make lint
   build:
     runs-on: ubuntu-latest
     timeout-minutes: 30
+    strategy:
+      fail-fast: false
+      matrix:
+        python:
+          - '3.10'
+          - '3.11'
     steps:
       - name: Checkout
         uses: actions/checkout@v3
       - name: Setup
         uses: ./.github/actions/setup
+        with:
+          python_version: ${{ matrix.python }}
       - name: Build
         run: make build
diff --git a/poetry.lock b/poetry.lock
index f31529f..035d73b 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -14,7 +14,10 @@ files = [
 
 [package.dependencies]
 lazy-object-proxy = ">=1.4.0"
-wrapt = {version = ">=1.14,<2", markers = "python_version >= \"3.11\""}
+wrapt = [
+    {version = ">=1.11,<2", markers = "python_version < \"3.11\""},
+    {version = ">=1.14,<2", markers = "python_version >= \"3.11\""},
+]
 
 [[package]]
 name = "attrs"
@@ -62,6 +65,7 @@ click = ">=8.0.0"
 mypy-extensions = ">=0.4.3"
 pathspec = ">=0.9.0"
 platformdirs = ">=2"
+tomli = {version = ">=1.1.0", markers = "python_full_version < \"3.11.0a7\""}
 
 [package.extras]
 colorama = ["colorama (>=0.4.3)"]
@@ -157,6 +161,9 @@ files = [
     {file = "coverage-7.0.2.tar.gz", hash = "sha256:405d8528a0ea07ca516d9007ecad4e1bd10e2eeef27411c6188d78c4e2dfcddc"},
 ]
 
+[package.dependencies]
+tomli = {version = "*", optional = true, markers = "python_full_version <= \"3.11.0a6\" and extra == \"toml\""}
+
 [package.extras]
 toml = ["tomli"]
 
@@ -186,6 +193,21 @@ files = [
     {file = "docopt-0.6.2.tar.gz", hash = "sha256:49b3a825280bd66b3aa83585ef59c4a8c82f2c8a522dbe754a8bc8d08c85c491"},
 ]
 
+[[package]]
+name = "exceptiongroup"
+version = "1.1.0"
+description = "Backport of PEP 654 (exception groups)"
+category = "dev"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "exceptiongroup-1.1.0-py3-none-any.whl", hash = "sha256:327cbda3da756e2de031a3107b81ab7b3770a602c4d16ca618298c526f4bec1e"},
+    {file = "exceptiongroup-1.1.0.tar.gz", hash = "sha256:bcb67d800a4497e1b404c2dd44fca47d3b7a5e5433dbab67f96c1a685cdfdf23"},
+]
+
+[package.extras]
+test = ["pytest (>=6)"]
+
 [[package]]
 name = "iniconfig"
 version = "1.1.1"
@@ -340,10 +362,14 @@ files = [
 [package.dependencies]
 astroid = ">=2.12.13,<=2.14.0-dev0"
 colorama = {version = ">=0.4.5", markers = "sys_platform == \"win32\""}
-dill = {version = ">=0.3.6", markers = "python_version >= \"3.11\""}
+dill = [
+    {version = ">=0.2", markers = "python_version < \"3.11\""},
+    {version = ">=0.3.6", markers = "python_version >= \"3.11\""},
+]
 isort = ">=4.2.5,<6"
 mccabe = ">=0.6,<0.8"
 platformdirs = ">=2.2.0"
+tomli = {version = ">=1.1.0", markers = "python_version < \"3.11\""}
 tomlkit = ">=0.10.1"
 
 [package.extras]
@@ -365,9 +391,11 @@ files = [
 [package.dependencies]
 attrs = ">=19.2.0"
 colorama = {version = "*", markers = "sys_platform == \"win32\""}
+exceptiongroup = {version = ">=1.0.0rc8", markers = "python_version < \"3.11\""}
 iniconfig = "*"
 packaging = "*"
 pluggy = ">=0.12,<2.0"
+tomli = {version = ">=1.0.0", markers = "python_version < \"3.11\""}
 
 [package.extras]
 testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "pygments (>=2.7.2)", "requests", "xmlschema"]
@@ -424,6 +452,18 @@ docopt = ">=0.4.0"
 pytest = ">=2.6.4"
 watchdog = ">=0.6.0"
 
+[[package]]
+name = "tomli"
+version = "2.0.1"
+description = "A lil' TOML parser"
+category = "dev"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "tomli-2.0.1-py3-none-any.whl", hash = "sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc"},
+    {file = "tomli-2.0.1.tar.gz", hash = "sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f"},
+]
+
 [[package]]
 name = "tomlkit"
 version = "0.11.6"
@@ -553,5 +593,5 @@ files = [
 
 [metadata]
 lock-version = "2.0"
-python-versions = "^3.11.0"
-content-hash = "b470d52522d0b95bd7d894c1a5d9182c717ed5650091669789de3f90e492ff56"
+python-versions = "^3.10.0"
+content-hash = "615ba72e93ee7ce811baed14fec89a88aed4e5e9a454bd54bab5ef90fea6f601"
diff --git a/pyproject.toml b/pyproject.toml
index a1b4e42..89e9258 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ homepage = "https://github.com/makenew/pypackage"
 repository = "https://github.com/makenew/pypackage"
 
 [tool.poetry.dependencies]
-python = "^3.11.0"
+python = "^3.10.0"
 
 [tool.poetry.dev-dependencies]
 black = "^22.3.0"