diff -rupN ns3.orig/Makefile ns3/Makefile
--- ns3.orig/Makefile	2018-07-29 22:18:44.000000000 +0000
+++ ns3/Makefile	2018-08-29 14:22:19.128911000 +0000
@@ -1,8 +1,7 @@
-# $FreeBSD: head/net/ns3/Makefile 475857 2018-07-29 22:18:44Z gerald $
+# $FreeBSD$
 
 PORTNAME=	ns3
-PORTVERSION=	3.28
-PORTREVISION=	1
+PORTVERSION=	3.28.1
 CATEGORIES=	net
 MASTER_SITES=	https://www.nsnam.org/release/
 DISTNAME=	ns-allinone-${PORTVERSION}
diff -rupN ns3.orig/distinfo ns3/distinfo
--- ns3.orig/distinfo	2018-05-04 16:04:09.000000000 +0000
+++ ns3/distinfo	2018-08-29 14:22:19.129027000 +0000
@@ -1,3 +1,3 @@
-TIMESTAMP = 1523622202
-SHA256 (ns-allinone-3.28.tar.bz2) = cfa27e06d21b789d352563c7c0c95ab9167a5d7610e98b463978e1b9efac3323
-SIZE (ns-allinone-3.28.tar.bz2) = 27081233
+TIMESTAMP = 1535537143
+SHA256 (ns-allinone-3.28.1.tar.bz2) = 1a777216ef88cfa3ede700582781c4b7ae69b26649406b8749d5588d5d43ea8e
+SIZE (ns-allinone-3.28.1.tar.bz2) = 27165424