diff --git a/.github/workflows/pr-checks.yml b/.github/workflows/pr-checks.yml
index 22a3a71..9899a52 100644
--- a/.github/workflows/pr-checks.yml
+++ b/.github/workflows/pr-checks.yml
@@ -41,7 +41,7 @@ jobs:
     strategy:
       matrix:
         platform: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13', '3.14']
+        python-version: ['3.10', '3.11', '3.12', '3.13', '3.14']
 
     steps:
     - name: Checkout repository
diff --git a/pyproject.toml b/pyproject.toml
index 5f1a94c..8ad1998 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,10 +13,9 @@ keywords = ["svg", "validation", "rfc", "internet-draft", "html"]
 readme = "README.md"
 license = "BSD-3-Clause"
 license-files = ["LICENSE"]
-requires-python = ">=2.7"
+requires-python = ">=3.9"
 classifiers = [
     "Development Status :: 5 - Production/Stable",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
diff --git a/tox.ini b/tox.ini
index ea9850b..7874ca3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,11 +4,10 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py{39,310,311,312,313,314}-{linux,macos,windows}
+envlist = py{310,311,312,313,314}-{linux,macos,windows}
 
 [gh-actions]
 python =
-	3.9: py39
 	3.10: py310
 	3.11: py311
 	3.12: py312