Index: head/net/py-zeroconf/Makefile
===================================================================
--- head/net/py-zeroconf/Makefile	(revision 491503)
+++ head/net/py-zeroconf/Makefile	(revision 491504)
@@ -1,25 +1,25 @@
 # Created by: John Hixson <jhixson@gmail.com>
 # $FreeBSD$
 
 PORTNAME=	zeroconf
-PORTVERSION=	0.20.0
+PORTVERSION=	0.21.3
 CATEGORIES=	net python
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	jhixson@FreeBSD.org
 COMMENT=	Pure python implementation of multicast DNS service discovery
 
 LICENSE=	LGPL21+
 
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}six>=1.4:devel/py-six@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}netifaces>=0.10.6:net/py-netifaces@${PY_FLAVOR}
 
-USES=		python
+USES=		python:3.5+
 USE_PYTHON=	autoplist concurrent distutils
 USE_GITHUB=	yes
 GH_ACCOUNT=	jstasiak
 GH_PROJECT=	python-zeroconf
 
 NO_ARCH=	yes
 
 .include <bsd.port.mk>
Index: head/net/py-zeroconf/distinfo
===================================================================
--- head/net/py-zeroconf/distinfo	(revision 491503)
+++ head/net/py-zeroconf/distinfo	(revision 491504)
@@ -1,3 +1,3 @@
-TIMESTAMP = 1527189832
-SHA256 (jstasiak-python-zeroconf-0.20.0_GH0.tar.gz) = 5829f2e68ca6ab06d25e661a7640cf1d215bf4167d952f81086f1fbfb4ef9dbb
-SIZE (jstasiak-python-zeroconf-0.20.0_GH0.tar.gz) = 36259
+TIMESTAMP = 1548448996
+SHA256 (jstasiak-python-zeroconf-0.21.3_GH0.tar.gz) = 8c3aaed98f950b56c6e1aa440b56e0d48af49565cb4d7830a82cb3b01088aad8
+SIZE (jstasiak-python-zeroconf-0.21.3_GH0.tar.gz) = 38336