Index: head/devel/py-pip-tools/Makefile
===================================================================
--- head/devel/py-pip-tools/Makefile	(revision 507799)
+++ head/devel/py-pip-tools/Makefile	(revision 507800)
@@ -1,26 +1,26 @@
 # Created by: Po-Chuan Hsieh <sunpoet@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	pip-tools
-PORTVERSION=	3.9.0
+PORTVERSION=	4.0.0
 CATEGORIES=	devel python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Keep your pinned dependencies fresh
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}setuptools_scm>=0:devel/py-setuptools_scm@${PY_FLAVOR}
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}click>=6:devel/py-click@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}six>=0:devel/py-six@${PY_FLAVOR}
 
 USES=		python
 USE_PYTHON=	autoplist concurrent distutils
 
 NO_ARCH=	yes
 USE_LOCALE=	en_US.UTF-8
 
 .include <bsd.port.mk>
Index: head/devel/py-pip-tools/distinfo
===================================================================
--- head/devel/py-pip-tools/distinfo	(revision 507799)
+++ head/devel/py-pip-tools/distinfo	(revision 507800)
@@ -1,3 +1,3 @@
-TIMESTAMP = 1563640713
-SHA256 (pip-tools-3.9.0.tar.gz) = 2457106d7df6b627cc54819e986db75ba5fbe8243ae3bdfbb79159c1f610e90b
-SIZE (pip-tools-3.9.0.tar.gz) = 100841
+TIMESTAMP = 1564577835
+SHA256 (pip-tools-4.0.0.tar.gz) = 3b9fb8948340eff5869ac83dc85e3a7c62b837cec33609c45c48c2e5aa740ba5
+SIZE (pip-tools-4.0.0.tar.gz) = 100332