diff --git a/www/py-html5lib-modern/Makefile b/www/py-html5lib-modern/Makefile
index c53fc47756d3..236453614247 100644
--- a/www/py-html5lib-modern/Makefile
+++ b/www/py-html5lib-modern/Makefile
@@ -1,23 +1,34 @@
 PORTNAME=	html5lib-modern
 PORTVERSION=	1.2
 CATEGORIES=	www python
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 DISTNAME=	html5lib_modern-${PORTVERSION}
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	HTML parser based on the WHATWG HTML specification
 WWW=		https://github.com/html5lib/html5lib-python
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}setuptools>=0:devel/py-setuptools@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}wheel>=0:devel/py-wheel@${PY_FLAVOR}
 
 USES=		python
 USE_PYTHON=	autoplist concurrent pep517
 
 NO_ARCH=	yes
 
+OPTIONS_DEFINE=	ALL CHARDET GENSHI LXML
+ALL_DESC=	All optional dependencies
+ALL_IMPLIES=	CHARDET GENSHI LXML
+CHARDET_DESC=	Fallback character encoding detector
+GENSHI_DESC=	Tree walking via genshi
+LXML_DESC=	Tree building/walking via lxml
+
+CHARDET_RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}chardet>=2.2.1,1:textproc/py-chardet@${PY_FLAVOR}
+GENSHI_RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}Genshi>=0.7.1:textproc/py-genshi@${PY_FLAVOR}
+LXML_RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}lxml>=3.4.0:devel/py-lxml@${PY_FLAVOR}
+
 .include <bsd.port.mk>