diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index a67956d..d905c28 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -7,11 +7,11 @@ on:
 
 jobs:
   main:
-    uses: asottile/workflows/.github/workflows/tox.yml@v1.8.1
+    uses: asottile/workflows/.github/workflows/tox.yml@v1.9.0
     with:
-      env: '["py39", "py310", "py311", "py312", "py313", "py314", "pypy3"]'
+      env: '["py310", "py311", "py312", "py313", "py314", "pypy3"]'
   main-win:
-    uses: asottile/workflows/.github/workflows/tox.yml@v1.8.1
+    uses: asottile/workflows/.github/workflows/tox.yml@v1.9.0
     with:
-      env: '["py39"]'
+      env: '["py310"]'
       os: windows-latest
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 7e9bbc8..e2b0126 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -17,7 +17,7 @@ repos:
     rev: v3.15.0
     hooks:
     -   id: reorder-python-imports
-        args: [--py39-plus, --add-import, 'from __future__ import annotations']
+        args: [--py310-plus, --add-import, 'from __future__ import annotations']
 -   repo: https://github.com/asottile/add-trailing-comma
     rev: v3.2.0
     hooks:
@@ -26,7 +26,7 @@ repos:
     rev: v3.20.0
     hooks:
     -   id: pyupgrade
-        args: [--py39-plus]
+        args: [--py310-plus]
 -   repo: https://github.com/hhatto/autopep8
     rev: v2.3.2
     hooks:
diff --git a/setup.cfg b/setup.cfg
index ad14788..a99ac47 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -19,7 +19,7 @@ classifiers =
 py_modules = sync_pre_commit_deps
 install_requires =
     ruamel.yaml>=0.17
-python_requires = >=3.9
+python_requires = >=3.10
 
 [options.entry_points]
 console_scripts =