Index: head/devel/py-graphql-core/Makefile
===================================================================
--- head/devel/py-graphql-core/Makefile	(revision 535902)
+++ head/devel/py-graphql-core/Makefile	(revision 535903)
@@ -1,21 +1,21 @@
 # Created by: Po-Chuan Hsieh <sunpoet@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	graphql-core
-PORTVERSION=	3.1.0
+PORTVERSION=	3.1.1
 CATEGORIES=	devel python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	GraphQL implementation for Python
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 USES=		python:3.6+
-USE_PYTHON=	autoplist distutils
+USE_PYTHON=	autoplist concurrent distutils
 
 NO_ARCH=	yes
 
 .include <bsd.port.mk>
Index: head/devel/py-graphql-core/distinfo
===================================================================
--- head/devel/py-graphql-core/distinfo	(revision 535902)
+++ head/devel/py-graphql-core/distinfo	(revision 535903)
@@ -1,3 +1,3 @@
-TIMESTAMP = 1585985906
-SHA256 (graphql-core-3.1.0.tar.gz) = d43cf1f149772c7014656d4bc4c512278a16722e80e4be2daf99894ffef871db
-SIZE (graphql-core-3.1.0.tar.gz) = 481719
+TIMESTAMP = 1589908774
+SHA256 (graphql-core-3.1.1.tar.gz) = 1fdc57d08f4492f06b21f3d487311e88fa8c33e0ac1e2d74ec79fb411ceba64a
+SIZE (graphql-core-3.1.1.tar.gz) = 481850