Index: head/x11-toolkits/py-xlib/Makefile
===================================================================
--- head/x11-toolkits/py-xlib/Makefile	(revision 462615)
+++ head/x11-toolkits/py-xlib/Makefile	(revision 462616)
@@ -1,26 +1,29 @@
 # Created by: Mike Meyer <mwm@mired.org>
 # $FreeBSD$
 
 PORTNAME=	xlib
-PORTVERSION=	0.20
+PORTVERSION=	0.21
 CATEGORIES=	x11-toolkits python
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	fax@nohik.ee
 COMMENT=	X11 library for Python
 
 LICENSE=	GPLv2+
+LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}setuptools_scm>=1.7:devel/py-setuptools_scm@${FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}six>=1.10.0:devel/py-six@${FLAVOR}
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}six>=1.10.0:devel/py-six@${FLAVOR}
 
+USES=		python
+
+USE_GITHUB=	yes
 GH_ACCOUNT=	python-xlib
 GH_PROJECT=	python-xlib
 
-USES=		python
-USE_GITHUB=	yes
-USE_PYTHON=	distutils autoplist
+USE_PYTHON=	autoplist concurrent distutils
+
 NO_ARCH=	yes
 
 .include <bsd.port.mk>
Index: head/x11-toolkits/py-xlib/distinfo
===================================================================
--- head/x11-toolkits/py-xlib/distinfo	(revision 462615)
+++ head/x11-toolkits/py-xlib/distinfo	(revision 462616)
@@ -1,3 +1,3 @@
-TIMESTAMP = 1506335181
-SHA256 (python-xlib-python-xlib-0.20_GH0.tar.gz) = 3b7ebd9aa96110f72adfeb305df210590ab35b69bfbd06afe0c2697f65047b09
-SIZE (python-xlib-python-xlib-0.20_GH0.tar.gz) = 231419
+TIMESTAMP = 1519319999
+SHA256 (python-xlib-python-xlib-0.21_GH0.tar.gz) = 14bc4eb406f5dc071410520751ddd239fb19499bafeefb31abc9be367ec47741
+SIZE (python-xlib-python-xlib-0.21_GH0.tar.gz) = 217379