diff --git a/textproc/py-mkdocstrings-crystal/Makefile b/textproc/py-mkdocstrings-crystal/Makefile
index 02138b82804b..c2b698b3aee1 100644
--- a/textproc/py-mkdocstrings-crystal/Makefile
+++ b/textproc/py-mkdocstrings-crystal/Makefile
@@ -1,28 +1,28 @@
 PORTNAME=	mkdocstrings-crystal
 DISTVERSION=	0.3.7
 CATEGORIES=	textproc python
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 DISTNAME=	mkdocstrings_crystal-${DISTVERSION}
 
 MAINTAINER=	kai@FreeBSD.org
 COMMENT=	Crystal language doc generator for mkdocstrings
 WWW=		https://github.com/mkdocstrings/crystal
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE.md
 
 BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}hatchling>0:devel/py-hatchling@${PY_FLAVOR}
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}markdown-callouts>=0.1.0:textproc/py-markdown-callouts@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}mkdocs-autorefs>=0.3.1:textproc/py-mkdocs-autorefs@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}markupsafe>=1.1.1:textproc/py-markupsafe@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}Jinja2>=2.11.2:devel/py-Jinja2@${PY_FLAVOR}
 # textproc/py-mkdocstrings belongs to RUN_DEPENDS as well but would cause
 # a circular dependency (via py-mkdocstrings' CRYSTAL option)
 
-USES=		python
+USES=		python:3.9+ # textproc/py-mkdocs-autorefs requires Python 3.9+
 USE_PYTHON=	autoplist pep517
 
 NO_ARCH=	yes
 
 .include <bsd.port.mk>
diff --git a/textproc/py-mkdocstrings-python-legacy/Makefile b/textproc/py-mkdocstrings-python-legacy/Makefile
index 809135222bab..fd5c91beba8b 100644
--- a/textproc/py-mkdocstrings-python-legacy/Makefile
+++ b/textproc/py-mkdocstrings-python-legacy/Makefile
@@ -1,33 +1,33 @@
 PORTNAME=	mkdocstrings-python-legacy
 DISTVERSION=	0.2.4
 CATEGORIES=	textproc python
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 DISTNAME=	mkdocstrings_python_legacy-${PORTVERSION}
 
 MAINTAINER=	kai@FreeBSD.org
 COMMENT=	Legacy Python handler for mkdocstrings
 WWW=		https://github.com/mkdocstrings/python-legacy
 
 LICENSE=	ISCL
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pdm-backend>0:devel/py-pdm-backend@${PY_FLAVOR}
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}mkdocs-autorefs>=1.1:textproc/py-mkdocs-autorefs@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}pytkdocs>=0.14:textproc/py-pytkdocs@${PY_FLAVOR}
 TEST_DEPENDS=	${PYTHON_PKGNAMEPREFIX}mkdocs-material>0:textproc/py-mkdocs-material@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}mkdocstrings>0:textproc/py-mkdocstrings@${PY_FLAVOR}
 # textproc/py-mkdocstrings belongs to RUN_DEPENDS as well but would cause
 # a circular dependency (via py-mkdocstrings' PYTHONLEGACY option).  It was
 # therefore # moved to TEST_DEPENDS to at least allow the test suite to run.
 
-USES=		python
+USES=		python:3.9+ # textproc/py-mkdocs-autorefs requires Python 3.9+
 USE_PYTHON=	autoplist pep517 pytest
 
 TEST_ENV=	PYTHONPATH=${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}
 
 CONFLICTS_INSTALL=	${PYTHON_PKGNAMEPREFIX}mkdocstrings-python
 
 NO_ARCH=	yes
 
 .include <bsd.port.mk>