diff --git a/graphics/py-nwdiag/Makefile b/graphics/py-nwdiag/Makefile
index cc0afa9cbf08..c634b7eeaf7e 100644
--- a/graphics/py-nwdiag/Makefile
+++ b/graphics/py-nwdiag/Makefile
@@ -1,47 +1,47 @@
 # Created by: TAKATSU Tomonari <tota@FreeBSD.org>
 
 PORTNAME=	nwdiag
-PORTVERSION=	2.0.0
+PORTVERSION=	3.0.0
 CATEGORIES=	graphics python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	tota@FreeBSD.org
 COMMENT=	Simple network-diagram image generator
 
 LICENSE=	APACHE20
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}blockdiag>=1.5.0:graphics/py-blockdiag@${PY_FLAVOR}
 
-USES=		python:3.5+
+USES=		python:3.7+
 USE_PYTHON=	autoplist distutils
 
 DOCSDIR=	${PREFIX}/share/doc/${PKGBASE}
 EXAMPLESDIR=	${PREFIX}/share/examples/${PKGBASE}
 
 PORTDOCS=	README.rst
 PORTEXAMPLES=	*
 
 OPTIONS_DEFINE=	DOCS EXAMPLES
 
 post-install:
 .for f in ${PORTNAME} rackdiag
 	${INSTALL_MAN} ${WRKSRC}/${f}.1 ${STAGEDIR}${PREFIX}/man/man1/
 	@${ECHO_CMD} man/man1/${f}.1.gz >> ${TMPPLIST}
 .endfor
 
 post-install-DOCS-on:
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	${INSTALL_DATA} ${INSTALL_WRKSRC}/${PORTDOCS} ${STAGEDIR}${DOCSDIR}
 
 post-install-EXAMPLES-on:
 	@${MKDIR} ${STAGEDIR}${EXAMPLESDIR}
 .for d in ${PORTNAME} packetdiag
 	@${MKDIR} ${STAGEDIR}${EXAMPLESDIR}/${d}
 	${INSTALL_DATA} \
 		${INSTALL_WRKSRC}/examples/${d}/${PORTEXAMPLES} \
 		${STAGEDIR}${EXAMPLESDIR}/${d}
 .endfor
 
 .include <bsd.port.mk>
diff --git a/graphics/py-nwdiag/distinfo b/graphics/py-nwdiag/distinfo
index 5d39bc3f497b..ff5796c17b1f 100644
--- a/graphics/py-nwdiag/distinfo
+++ b/graphics/py-nwdiag/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1584006817
-SHA256 (nwdiag-2.0.0.tar.gz) = 5cd7fafd6085cd762ca9171234d07d2a33c6e81f5c66a1b233992e76300d74e2
-SIZE (nwdiag-2.0.0.tar.gz) = 7751634
+TIMESTAMP = 1651833399
+SHA256 (nwdiag-3.0.0.tar.gz) = e267530fcaac8a1d9e7403048597ed30e031e17f0191569dc6f704087bacb2eb
+SIZE (nwdiag-3.0.0.tar.gz) = 7750437