diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index f224d06..a7fae6a 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -16,7 +16,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: [3.8]
+        python-version: [3.9.1]
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
diff --git a/.github/workflows/publish-to-production-pypi.yml b/.github/workflows/publish-to-production-pypi.yml
index 17283eb..a793146 100644
--- a/.github/workflows/publish-to-production-pypi.yml
+++ b/.github/workflows/publish-to-production-pypi.yml
@@ -11,13 +11,13 @@ on:
 jobs:
   build-n-publish:
     name: Build and publish Python 🐍 distributions 📦 to PyPI
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@master
-    - name: Set up Python 3.7
+    - name: Set up Python 3.9.1
       uses: actions/setup-python@v1
       with:
-        python-version: 3.7
+        python-version: 3.9.1
     - name: Install pypa/build
       run: >-
         python -m
diff --git a/.github/workflows/publish-to-test-pypi.yml b/.github/workflows/publish-to-test-pypi.yml
index 1de434f..d53238b 100644
--- a/.github/workflows/publish-to-test-pypi.yml
+++ b/.github/workflows/publish-to-test-pypi.yml
@@ -10,13 +10,13 @@ on:
 jobs:
   build-n-publish:
     name: Build and publish Python 🐍 distributions 📦 to TestPyPI
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@master
-    - name: Set up Python 3.7
+    - name: Set up Python 3.9.1
       uses: actions/setup-python@v1
       with:
-        python-version: 3.7
+        python-version: 3.9.1
     - name: Install pypa/build
       run: >-
         python -m