Index: head/textproc/py-qrcode/Makefile
===================================================================
--- head/textproc/py-qrcode/Makefile
+++ head/textproc/py-qrcode/Makefile
@@ -3,7 +3,7 @@
 
 PORTNAME=	qrcode
 PORTVERSION=	5.3
-PORTREVISION=	2
+PORTREVISION=	3
 CATEGORIES=	textproc python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
@@ -17,7 +17,7 @@
 		${PYTHON_PKGNAMEPREFIX}pillow>=2.6:graphics/py-pillow@${FLAVOR}
 
 USES=		python
-USE_PYTHON=	autoplist distutils
+USE_PYTHON=	autoplist concurrent distutils
 
 post-patch:
 	${REINPLACE_CMD} -e 's|share/\(man/man1\)|\1|' ${WRKSRC}/setup.py