diff --git a/graphics/py-seqdiag/Makefile b/graphics/py-seqdiag/Makefile
index 1fdb6eff6942..6e8aeee544e7 100644
--- a/graphics/py-seqdiag/Makefile
+++ b/graphics/py-seqdiag/Makefile
@@ -1,40 +1,40 @@
 # Created by: TAKATSU Tomonari <tota@FreeBSD.org>
 
 PORTNAME=	seqdiag
-PORTVERSION=	2.0.0
+PORTVERSION=	3.0.0
 CATEGORIES=	graphics python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	tota@FreeBSD.org
 COMMENT=	Simple sequence-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:
 	${INSTALL_MAN} ${WRKSRC}/${PORTNAME}.1 ${STAGEDIR}${PREFIX}/man/man1/
 	@${ECHO_CMD} man/man1/${PORTNAME}.1.gz >> ${TMPPLIST}
 
 post-install-DOCS-on:
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	${INSTALL_DATA} ${INSTALL_WRKSRC}/${PORTDOCS} ${STAGEDIR}${DOCSDIR}
 
 post-install-EXAMPLES-on:
 	@${MKDIR} ${STAGEDIR}${EXAMPLESDIR}
 	${INSTALL_DATA} ${INSTALL_WRKSRC}/examples/${PORTEXAMPLES} ${STAGEDIR}${EXAMPLESDIR}
 
 .include <bsd.port.mk>
diff --git a/graphics/py-seqdiag/distinfo b/graphics/py-seqdiag/distinfo
index 15e9346aa803..b662a49ac706 100644
--- a/graphics/py-seqdiag/distinfo
+++ b/graphics/py-seqdiag/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1584005167
-SHA256 (seqdiag-2.0.0.tar.gz) = 93ebc7a0c6b56b6ba0d1e36863c5749f03e82c487b6d1e6f1103b4219323f24c
-SIZE (seqdiag-2.0.0.tar.gz) = 2619184
+TIMESTAMP = 1651833559
+SHA256 (seqdiag-3.0.0.tar.gz) = e15113a28bd075460a62da44e15a88fafa3c81fdf3a35dcd5e3cd64ef15e961a
+SIZE (seqdiag-3.0.0.tar.gz) = 2619076