Index: head/comms/libmodbus/Makefile
===================================================================
--- head/comms/libmodbus/Makefile	(revision 519003)
+++ head/comms/libmodbus/Makefile	(revision 519004)
@@ -1,25 +1,24 @@
 # $FreeBSD$
 
 PORTNAME=	libmodbus
-PORTVERSION=	3.1.4
-PORTREVISION=	1
+PORTVERSION=	3.1.6
 CATEGORIES=	comms
 MASTER_SITES=	http://libmodbus.org/site_media/build/
 
 MAINTAINER=	bsam@FreeBSD.org
 COMMENT=	Modbus library
 
 LICENSE=	LGPL21+
 LICENSE_FILE=	${WRKSRC}/COPYING.LESSER
 
 BUILD_DEPENDS=	a2x:textproc/asciidoc \
 		xmlto:textproc/xmlto
 
 GNU_CONFIGURE=	yes
 USE_LDCONFIG=	yes
 USES=		gmake libtool pathfix
 INSTALL_TARGET=	install-strip
 
 OPTIONS_DEFINE=	DOCS
 
 .include <bsd.port.mk>
Index: head/comms/libmodbus/distinfo
===================================================================
--- head/comms/libmodbus/distinfo	(revision 519003)
+++ head/comms/libmodbus/distinfo	(revision 519004)
@@ -1,3 +1,3 @@
-TIMESTAMP = 1464558272
-SHA256 (libmodbus-3.1.4.tar.gz) = c8c862b0e9a7ba699a49bc98f62bdffdfafd53a5716c0e162696b4bf108d3637
-SIZE (libmodbus-3.1.4.tar.gz) = 471576
+TIMESTAMP = 1575451445
+SHA256 (libmodbus-3.1.6.tar.gz) = d7d9fa94a16edb094e5fdf5d87ae17a0dc3f3e3d687fead81835d9572cf87c16
+SIZE (libmodbus-3.1.6.tar.gz) = 479565