diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f19037a3..ecfd3ca8 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -22,20 +22,18 @@ jobs:
     strategy:
       matrix:
         include:
-          - os: ubuntu-22.04
-            python: "3.9"
           - os: ubuntu-22.04
             python: "3.10"
           - os: ubuntu-22.04
             python: "3.11"
           - os: ubuntu-22.04
-            python: "3.9"
+            python: "3.10"
             tesseract5: true
           - os: ubuntu-latest
             python: "3.12"
             tesseract5: true
-            #- os: ubuntu-latest
-            #  python: "pypy3.9"
+          - os: ubuntu-latest
+            python: "pypy3.10"
 
     env:
       OS: ${{ matrix.os }}
@@ -219,7 +217,7 @@ jobs:
       - uses: actions/setup-python@v4
         name: Setup Python
         with:
-          python-version: "3.9"
+          python-version: "3.10"
           cache: "pip"
 
       - name: Make wheels and sdist
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 0ae35f32..ccfc0840 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -19,7 +19,7 @@ formats:
 build:
   os: ubuntu-22.04
   tools:
-    python: "3.9"
+    python: "3.10"
 
 python:
   install:
diff --git a/docs/installation.rst b/docs/installation.rst
index 18a83841..232403fa 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -452,7 +452,7 @@ Cygwin64
 
 First install the the following prerequisite Cygwin packages using ``setup-x86_64.exe``::
 
-    python39 (or later)
+    python310 (or later)
     python3?-devel
     python3?-pip
     python3?-lxml
@@ -550,7 +550,7 @@ manager. ``pip`` cannot provide them.
 
 The following versions are required:
 
--  Python 3.9 or newer
+-  Python 3.10 or newer
 -  Ghostscript 9.55 or newer
 -  Tesseract 4.1.1 or newer
 -  jbig2enc 0.29 or newer
@@ -586,7 +586,7 @@ unfortunately, the ``pip install`` command cannot satisfy all of them.
 Installing HEAD revision from sources
 =====================================
 
-If you have ``git`` and Python 3.9 or newer installed, you can install
+If you have ``git`` and Python 3.10 or newer installed, you can install
 from source. When the ``pip`` installer runs, it will alert you if
 dependencies are missing.
 
diff --git a/pyproject.toml b/pyproject.toml
index ff82cef9..1dd4ace6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ dynamic = ["version"]
 description = "OCRmyPDF adds an OCR text layer to scanned PDF files, allowing them to be searched"
 readme = "README.md"
 license = { text = "MPL-2.0" }
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dependencies = [
   "Pillow>=10.0.1",
   "deprecation>=2.1.0",
@@ -20,7 +20,6 @@ dependencies = [
   "pikepdf>=8.7.1",
   "pluggy>=0.13.0",
   "rich>=13",
-  "typing-extensions>=4;python_version<'3.10'",
 ]
 authors = [{ name = "James R. Barlow", email = "james@purplerock.ca" }]
 classifiers = [
diff --git a/src/ocrmypdf/_exec/unpaper.py b/src/ocrmypdf/_exec/unpaper.py
index 493d9b3a..7efc51b6 100644
--- a/src/ocrmypdf/_exec/unpaper.py
+++ b/src/ocrmypdf/_exec/unpaper.py
@@ -14,6 +14,7 @@ from contextlib import contextmanager
 from decimal import Decimal
 from pathlib import Path
 from subprocess import PIPE, STDOUT
+from tempfile import TemporaryDirectory
 from typing import Union
 
 from packaging.version import Version
@@ -26,27 +27,6 @@ from ocrmypdf.subprocess import get_version, run
 # https://github.com/Flameeyes/unpaper/blob/main/doc/basic-concepts.md
 
 
-if sys.version_info >= (3, 10):
-    from tempfile import TemporaryDirectory
-else:
-    from tempfile import TemporaryDirectory as _TemporaryDirectory
-
-    class TemporaryDirectory(_TemporaryDirectory):
-        """Shim to consume ignore_cleanup_errors kwarg on Python 3.9 and older.
-
-        The argument is consumed without action. If users are getting errors related
-        to temporary file cleanup, they should upgrade to Python 3.10 which properly
-        cleans up temporary directories on Windows.
-
-        See: https://github.com/python/cpython/pull/24793
-        """
-
-        def __init__(self, ignore_cleanup_errors=False, **kwargs):
-            super().__init__(**kwargs)
-
-    del _TemporaryDirectory
-
-
 UNPAPER_IMAGE_PIXEL_LIMIT = 256 * 1024 * 1024
 
 DecFloat = Union[Decimal, float]