Index: head/devel/py-marshmallow/Makefile
===================================================================
--- head/devel/py-marshmallow/Makefile	(revision 509533)
+++ head/devel/py-marshmallow/Makefile	(revision 509534)
@@ -1,24 +1,24 @@
 # Created by: Mark Felder <feld@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	marshmallow
-DISTVERSION=	3.0.0rc5
+PORTVERSION=	3.0.0
 CATEGORIES=	devel python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Simplified object serialization for Python
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}dateutil>=2.7.0:devel/py-dateutil@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}simplejson>=0:devel/py-simplejson@${PY_FLAVOR}
 
-USES=		python
-USE_PYTHON=	autoplist concurrent distutils
+USES=		python:3.5+
+USE_PYTHON=	autoplist distutils
 
 NO_ARCH=	yes
 
 .include <bsd.port.mk>
Index: head/devel/py-marshmallow/distinfo
===================================================================
--- head/devel/py-marshmallow/distinfo	(revision 509533)
+++ head/devel/py-marshmallow/distinfo	(revision 509534)
@@ -1,3 +1,3 @@
-TIMESTAMP = 1557679694
-SHA256 (marshmallow-3.0.0rc5.tar.gz) = ea2a241f2ea69bb0863f2c00b907a8e22d7dd8b6d5b9960135906037c9dd7068
-SIZE (marshmallow-3.0.0rc5.tar.gz) = 166684
+TIMESTAMP = 1566393171
+SHA256 (marshmallow-3.0.0.tar.gz) = fa2d8a4b61d09b0e161a14acc5ad8ab7aaaf1477f3dd52819ddd6c6c8275733a
+SIZE (marshmallow-3.0.0.tar.gz) = 168015