diff --git a/requirements-dev.txt b/requirements-dev.txt
index b4b652b..1a8d501 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -2,15 +2,15 @@
 Pygments==2.19.2
 SecretStorage==3.3.3
 black==24.10.0
-build==1.2.2.post1
-certifi==2025.7.14
+build==1.3.0
+certifi==2025.8.3
 cffi==1.17.1
 changelet==0.1.0
 charset-normalizer==3.4.2
 click==8.1.8; python_version<'3.10'
 click==8.2.1; python_version>='3.10'
 cmarkgfm==2024.11.20
-coverage==7.10.0
+coverage==7.10.1
 cryptography==45.0.5
 docutils==0.21.2
 id==1.5.0
@@ -31,19 +31,19 @@ pathspec==0.12.1
 platformdirs==4.3.8
 pluggy==1.6.0
 pprintpp==0.4.0
-pycountry-convert==0.7.2
 pycountry==24.6.1
+pycountry-convert==0.7.2
 pycparser==2.22
 pyflakes==3.4.0
 pyproject_hooks==1.2.0
+pytest==8.4.1
 pytest-cov==6.2.1
 pytest-mock==3.14.1
-pytest==8.4.1
 pytest_network==0.0.1
 readme_renderer==44.0
 repoze.lru==0.7
-requests-toolbelt==1.0.0
 requests==2.32.4
+requests-toolbelt==1.0.0
 rfc3986==2.0.0
 rich==14.1.0
 semver==3.0.4
diff --git a/requirements-docs.txt b/requirements-docs.txt
new file mode 100644
index 0000000..05efa5f
--- /dev/null
+++ b/requirements-docs.txt
@@ -0,0 +1,24 @@
+# DO NOT EDIT THIS FILE DIRECTLY - use ./script/update-requirements to update
+Jinja2==3.1.6
+MarkupSafe==3.0.2
+Sphinx==8.2.3
+accessible-pygments==0.0.5
+alabaster==1.0.0
+babel==2.17.0
+beautifulsoup4==4.13.4
+furo==2025.7.19
+imagesize==1.4.1
+mdit-py-plugins==0.4.2
+myst-parser==4.0.1
+roman-numerals-py==3.1.0
+snowballstemmer==3.0.1
+soupsieve==2.7
+sphinx-basic-ng==1.0.0b2
+sphinx-copybutton==0.5.2
+sphinxcontrib-applehelp==2.0.0
+sphinxcontrib-devhelp==2.0.0
+sphinxcontrib-htmlhelp==2.1.0
+sphinxcontrib-jsmath==1.0.1
+sphinxcontrib-qthelp==2.0.0
+sphinxcontrib-serializinghtml==2.0.0
+typing_extensions==4.14.1
diff --git a/script/bootstrap b/script/bootstrap
index a7d85e7..90071ac 100755
--- a/script/bootstrap
+++ b/script/bootstrap
@@ -26,7 +26,7 @@ python -m pip install -U 'pip>=10.0.1'
 python -m pip install -r requirements.txt
 
 if [ "$ENV" != "production" ]; then
-    python -m pip install -r requirements-dev.txt
+    python -m pip install -r requirements-dev.txt -r requirements-docs.txt
 fi
 
 if [ -d ".git" ]; then
diff --git a/script/update-requirements b/script/update-requirements
index c1adc47..870b144 100755
--- a/script/update-requirements
+++ b/script/update-requirements
@@ -1,70 +1,75 @@
 #!/usr/bin/env python3
 
-import re
 from os.path import join
 from subprocess import check_call, check_output
-from sys import argv
+from sys import argv, stdout
 from tempfile import TemporaryDirectory
 
-
-def print_packages(packages, heading):
-    print(f'{heading}:')
-    print('  ', end='')
-    print('\n  '.join(packages))
-
-
-# would  be nice if there was a cleaner way to get this, but I've not found a
-# more reliable one.
-with open('setup.py') as fh:
-    match = re.search(r"name='(?P<pkg>[\w-]+)',", fh.read())
-    if not match:
-        raise Exception('failed to determine our package name')
-    our_package_name = match.group('pkg')
-    print(f'our_package_name: {our_package_name}')
-
 with TemporaryDirectory() as tmpdir:
     check_call(['python3', '-m', 'venv', tmpdir])
 
+    def install_and_list(target):
+        check_call([join(tmpdir, 'bin', 'pip'), 'install', target])
+        frozen = (
+            check_output([join(tmpdir, 'bin', 'pip'), 'freeze'])
+            .decode('utf-8')
+            .strip()
+            .split('\n')
+        )
+        # file bit skips ourself
+        return set(p.split('=', 1)[0] for p in frozen if 'file' not in p)
+
     # base needs
-    check_call([join(tmpdir, 'bin', 'pip'), 'install', '.'])
-    frozen = check_output([join(tmpdir, 'bin', 'pip'), 'freeze'])
-    frozen = set(frozen.decode('utf-8').strip().split('\n'))
+    frozen = install_and_list('.')
+    # dev needs
+    dev_frozen = install_and_list('.[dev]') - frozen
+    # docs needs
+    docs_frozen = install_and_list('.[docs]') - dev_frozen - frozen
 
-    # dev additions
-    check_call([join(tmpdir, 'bin', 'pip'), 'install', '.[dev]'])
-    dev_frozen = check_output([join(tmpdir, 'bin', 'pip'), 'freeze'])
-    dev_frozen = set(dev_frozen.decode('utf-8').strip().split('\n')) - frozen
-
-# pip installs the module itself along with deps so we need to get that out of
-# our list by finding the thing that was file installed during dev
-frozen = sorted([p for p in frozen if not p.startswith(our_package_name)])
-dev_frozen = sorted(
-    [p for p in dev_frozen if not p.startswith(our_package_name)]
-)
+    # find the installed version for each package
+    versions = {}
+    for pv in (
+        check_output([join(tmpdir, 'bin', 'pip'), 'freeze'])
+        .decode('utf-8')
+        .strip()
+        .split('\n')
+    ):
+        if 'file' in pv:
+            # skip ourself
+            continue
+        p, v = pv.split('==')
+        versions[p] = (v,)
 
 # special handling for click until python 3.9 is gone due to it dropping
 # support for active versions early
-i = [i for i, r in enumerate(dev_frozen) if r.startswith('click==')][0]
-dev_frozen = (
-    dev_frozen[:i]
-    + [
-        "click==8.1.8; python_version<'3.10'",
-        f"{dev_frozen[i]}; python_version>='3.10'",
-    ]
-    + dev_frozen[i + 1 :]
+versions['click'] = (
+    "8.1.8; python_version<'3.10'",
+    f"{versions['click'][0]}; python_version>='3.10'",
 )
 
-print_packages(frozen, 'frozen')
-print_packages(dev_frozen, 'dev_frozen')
 
-script = argv[0]
+def write_packages(fh, packages, header, prefix=''):
+    fh.write(header)
+    for p in sorted(packages):
+        for v in versions[p]:
+            fh.write(prefix)
+            fh.write(p)
+            fh.write('==')
+            fh.write(v)
+            fh.write('\n')
+
+
+write_packages(stdout, frozen, header='base\n', prefix='  ')
+write_packages(stdout, dev_frozen, header='dev\n', prefix='  ')
+write_packages(stdout, docs_frozen, header='docs\n', prefix='  ')
+
+header = f'# DO NOT EDIT THIS FILE DIRECTLY - use {argv[0]} to update\n'
 
 with open('requirements.txt', 'w') as fh:
-    fh.write(f'# DO NOT EDIT THIS FILE DIRECTLY - use {script} to update\n')
-    fh.write('\n'.join(frozen))
-    fh.write('\n')
+    write_packages(fh, frozen, header=header)
 
 with open('requirements-dev.txt', 'w') as fh:
-    fh.write(f'# DO NOT EDIT THIS FILE DIRECTLY - use {script} to update\n')
-    fh.write('\n'.join(dev_frozen))
-    fh.write('\n')
+    write_packages(fh, dev_frozen, header=header)
+
+with open('requirements-docs.txt', 'w') as fh:
+    write_packages(fh, docs_frozen, header=header)
diff --git a/setup.py b/setup.py
index c2ca94a..5827ca7 100644
--- a/setup.py
+++ b/setup.py
@@ -70,7 +70,13 @@ setup(
             'pyflakes>=2.2.0',
             'readme_renderer[md]>=26.0',
             'twine>=3.4.2',
-        )
+        ),
+        'docs': (
+            'Sphinx>=8.2.3',
+            'furo>=2024.8.6',
+            'myst-parser>=4.0.1',
+            'sphinx-copybutton>=0.5.2',
+        ),
     },
     install_requires=(
         'PyYaml>=4.2b1',