Index: head/devel/py-jupyterlab_launcher/Makefile
===================================================================
--- head/devel/py-jupyterlab_launcher/Makefile	(revision 477469)
+++ head/devel/py-jupyterlab_launcher/Makefile	(revision 477470)
@@ -1,22 +1,22 @@
 # $FreeBSD$
 
 PORTNAME=	jupyterlab_launcher
-DISTVERSION=	0.12.0
+DISTVERSION=	0.13.1
 CATEGORIES=	devel
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Jupyter Launcher (launcher for the JupiterLab environment)
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}jsonschema>=2.6.0:devel/py-jsonschema@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}notebook>=4.2.0:www/py-notebook@${PY_FLAVOR}
 
-USES=		python
+USES=		python:3.4+
 USE_PYTHON=	distutils autoplist
 NO_ARCH=	yes
 
 .include <bsd.port.mk>
Index: head/devel/py-jupyterlab_launcher/distinfo
===================================================================
--- head/devel/py-jupyterlab_launcher/distinfo	(revision 477469)
+++ head/devel/py-jupyterlab_launcher/distinfo	(revision 477470)
@@ -1,3 +1,3 @@
-TIMESTAMP = 1534031818
-SHA256 (jupyterlab_launcher-0.12.0.tar.gz) = 75f4b62bf79b273a85f1e09bc93f3f21f3aae631115e2b129e01833d5d885290
-SIZE (jupyterlab_launcher-0.12.0.tar.gz) = 20210
+TIMESTAMP = 1534493378
+SHA256 (jupyterlab_launcher-0.13.1.tar.gz) = f880eada0b8b1f524d5951dc6fcae0d13b169897fc8a247d75fb5beadd69c5f0
+SIZE (jupyterlab_launcher-0.13.1.tar.gz) = 20418