diff --git a/comms/libmodbus/Makefile b/comms/libmodbus/Makefile
index 8793579d2d60..64b7b6321343 100644
--- a/comms/libmodbus/Makefile
+++ b/comms/libmodbus/Makefile
@@ -1,8 +1,7 @@
 # $FreeBSD$
 
 PORTNAME=	libmodbus
-PORTVERSION=	3.1.4
-PORTREVISION=	1
+PORTVERSION=	3.1.6
 CATEGORIES=	comms
 MASTER_SITES=	http://libmodbus.org/site_media/build/
 
diff --git a/comms/libmodbus/distinfo b/comms/libmodbus/distinfo
index 8de0d9b2ba5c..daa2d6af63bb 100644
--- a/comms/libmodbus/distinfo
+++ b/comms/libmodbus/distinfo
@@ -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