diff --git a/textproc/py-sphinx-book-theme/Makefile b/textproc/py-sphinx-book-theme/Makefile
index 60cd2094b589..39a7176810c8 100644
--- a/textproc/py-sphinx-book-theme/Makefile
+++ b/textproc/py-sphinx-book-theme/Makefile
@@ -1,34 +1,34 @@
 PORTNAME=	sphinx-book-theme
 PORTVERSION=	0.3.3
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	textproc python
 MASTER_SITES=	PYPI \
 		LOCAL/sunpoet:static
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 DISTFILES=	sphinx_book_theme-${PORTVERSION}${EXTRACT_SUFX} \
 		sphinx_book_theme-${PORTVERSION}-static${EXTRACT_SUFX}:static
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Bootstrap-based Sphinx theme from the PyData community
 WWW=		https://github.com/executablebooks/sphinx-book-theme
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pydata-sphinx-theme>=0.8.0<0.9:textproc/py-pydata-sphinx-theme@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}yaml>=0:devel/py-yaml@${PY_FLAVOR} \
-		${PYTHON_PKGNAMEPREFIX}sphinx>=3,1<5,1:textproc/py-sphinx@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}sphinx>=3,1<6,1:textproc/py-sphinx@${PY_FLAVOR} \
 
 USES=		python:3.7+
 USE_PYTHON=	autoplist concurrent distutils
 
 NO_ARCH=	yes
 WRKSRC=		${WRKDIR}/sphinx_book_theme-${PORTVERSION}
 
 post-patch:
 	@${SED} -e 's|%%PORTVERSION%%|${PORTVERSION}|' ${FILESDIR}/setup.py > ${WRKSRC}/setup.py
 
 post-install:
 	cd ${WRKDIR}/static/ && ${COPYTREE_SHARE} . ${STAGEDIR}${PYTHON_SITELIBDIR}/sphinx_book_theme/
 
 .include <bsd.port.mk>
diff --git a/textproc/py-sphinx-book-theme/files/setup.py b/textproc/py-sphinx-book-theme/files/setup.py
index d39c8f31a7bc..555a8b6ce523 100644
--- a/textproc/py-sphinx-book-theme/files/setup.py
+++ b/textproc/py-sphinx-book-theme/files/setup.py
@@ -1,70 +1,70 @@
 from setuptools import setup
 
 setup(
     name = 'sphinx-book-theme',
     version = '%%PORTVERSION%%',
     description = 'A clean book theme for scientific explanations and documentation with Sphinx',
     maintainer = 'Chris Holdgraf',
     maintainer_email = 'choldgraf@gmail.com',
     url = None,
     packages = [
         'sphinx_book_theme',
         'sphinx_book_theme.header_buttons',
     ],
     package_dir = {'': 'src'},
     package_data = {'': ['*']},
     install_requires = [
-        'sphinx>=3,<5',
+        'sphinx>=3,<6',
         'pydata-sphinx-theme~=0.8.0',
         'pyyaml',
     ],
     extras_require = {
         'code_style': [
             'pre-commit~=2.7.0'
         ],
         'doc': [
             'ablog~=0.10.13',
             'ipywidgets',
             'folium',
             'numpy',
             'matplotlib',
             'numpydoc',
             'myst-nb~=0.13.2',
             'nbclient',
             'pandas',
             'plotly',
             'sphinx~=4.0',  # Force Sphinx to be the latest version
             'sphinx-copybutton',
             'sphinx-design',
             'sphinx-examples',
             'sphinx-tabs',
             'sphinx-togglebutton>=0.2.1',
             'sphinx-thebe>=0.1.1',
             'sphinxcontrib-bibtex~=2.2',
             'sphinxcontrib-youtube',
             'sphinxext-opengraph',
         ],
         'test': [
             'beautifulsoup4>=4.6.1,<5',
             'coverage',
             'myst_nb~=0.13.2',
             'pytest~=6.0.1',
             'pytest-cov',
             'pytest-regressions~=2.0.1',
             'sphinx_thebe'
         ],
     },
     entry_points = {
         'sphinx.html_themes': ['sphinx_book_theme = sphinx_book_theme'],
     },
     classifiers = [
         'Development Status :: 4 - Beta',
         'Programming Language :: Python :: 3',
         'Framework :: Sphinx',
         'Framework :: Sphinx :: Theme',
         'License :: OSI Approved :: BSD License',
         'Operating System :: OS Independent',
     ],
     license = 'BSD License',
     python_requires = '>= 3.7',
 )