diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0e7abe6..792d8c5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,9 +14,9 @@ jobs:
     name: Linting
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Set up Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: 3.9
       - name: Install dependencies
@@ -35,7 +35,7 @@ jobs:
       matrix:
         include:
           - name: Python36
-            os: ubuntu-latest
+            os: ubuntu-18.04
             pyversion: '3.6'
           - name: Python37
             os: ubuntu-latest
@@ -49,10 +49,13 @@ jobs:
           - name: Python310
             os: ubuntu-latest
             pyversion: '3.10'
+          - name: Python311
+            os: ubuntu-latest
+            pyversion: '3.11'
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Set up Python ${{ matrix.pyversion }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.pyversion }}
       - name: Install dependencies
diff --git a/setup.py b/setup.py
index c2cc671..d6d9e67 100644
--- a/setup.py
+++ b/setup.py
@@ -80,5 +80,6 @@ def get_version_and_doc(filename):
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
     ],
 )