diff --git a/biology/py-pywgsim/Makefile b/biology/py-pywgsim/Makefile
index 52a666286f56..7777162f708a 100644
--- a/biology/py-pywgsim/Makefile
+++ b/biology/py-pywgsim/Makefile
@@ -1,18 +1,19 @@
 PORTNAME=	pywgsim
 DISTVERSION=	0.5.2
+PORTREVISION=	1
 CATEGORIES=	biology python
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	jwb@FreeBSD.org
 COMMENT=	Modified wgsim genomic data simulator
 WWW=		https://pypi.python.org/pypi/pywgsim
 
 LICENSE=	MIT
 
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}plac>=0:devel/py-plac@${PY_FLAVOR}
 
-USES=		python
+USES=		python:3.10
 USE_PYTHON=	autoplist distutils
 
 .include <bsd.port.mk>