diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 931ec8b6..87e29b9b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.9', '3.10', '3.11', '3.12']
+        python-version: ['3.11', '3.12']
         os: ['windows-latest', 'macos-latest', 'ubuntu-latest']
     steps:
       - uses: actions/checkout@v4
diff --git a/.github/workflows/publish_pypi.yml b/.github/workflows/publish_pypi.yml
index 953399e1..b0039914 100644
--- a/.github/workflows/publish_pypi.yml
+++ b/.github/workflows/publish_pypi.yml
@@ -10,7 +10,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
-          python-version: '3.9'
+          python-version: '3.11'
       - name: Build a binary wheel and a source tarball
         run: |
           python -mpip install build
diff --git a/tox.ini b/tox.ini
index 8758f0ec..b58b94c7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,11 +1,9 @@
 [tox]
-envlist = py{39,310,311,312}
+envlist = py{311,312}
 
 
 [gh-actions]
 python =
-    3.9: py39
-    3.10: py310
     3.11: py311
     3.12: py312