diff --git a/textproc/py-grako/Makefile b/textproc/py-grako/Makefile
index 162e6ff5c993..0c040d656637 100644
--- a/textproc/py-grako/Makefile
+++ b/textproc/py-grako/Makefile
@@ -1,18 +1,18 @@
 PORTNAME=	grako
 DISTVERSION=	3.99.9
 CATEGORIES=	textproc python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Convert EBNF grammar to PEG/Packrat parser in Python
 
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE.txt
 
 BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pytest-runner>0:devel/py-pytest-runner@${PY_FLAVOR}
 
-USES=		python:3.6+ zip
+USES=		python:3.6-3.9 zip
 USE_PYTHON=	distutils cython autoplist
 
 .include <bsd.port.mk>