diff --git a/comms/libmodbus/Makefile b/comms/libmodbus/Makefile
index 00ac1fb92c56..3a9d0bdab92c 100644
--- a/comms/libmodbus/Makefile
+++ b/comms/libmodbus/Makefile
@@ -1,35 +1,35 @@
 PORTNAME=	libmodbus
 DISTVERSIONPREFIX=	v
-DISTVERSION=	3.1.11
+DISTVERSION=	3.1.12
 CATEGORIES=	comms
 
 MAINTAINER=	bofh@FreeBSD.org
 COMMENT=	Modbus library
 WWW=		https://libmodbus.org/
 
 LICENSE=	LGPL21+
 LICENSE_FILE=	${WRKSRC}/COPYING.LESSER
 
 USES=		autoreconf cpe gmake libtool
 USE_GITHUB=	yes
 GH_ACCOUNT=	stephane
 USE_LDCONFIG=	yes
 
 GNU_CONFIGURE=	yes
 
 INSTALL_TARGET=	install-strip
 
 OPTIONS_DEFINE=		DOCS MANPAGES
 OPTIONS_DEFAULT=	MANPAGES
 OPTIONS_SUB=		yes
 
 MANPAGES_BUILD_DEPENDS=	go-md2man:textproc/go-md2man
 
 post-install-MANPAGES-on:
 	go-md2man -in docs/index.md | ${GZIP_CMD} > ${STAGEDIR}${PREFIX}/share/man/man7/libmodbus.7.gz
 	for files in `${FIND} ${WRKSRC}/docs -type f -name 'modbus*.md'`; do \
 		basefiles=`basename $${files} .md`; \
 		go-md2man -in $${files} | ${GZIP_CMD} > ${STAGEDIR}${PREFIX}/share/man/man3/$${basefiles}.3.gz; \
 	done
 
 .include <bsd.port.mk>
diff --git a/comms/libmodbus/distinfo b/comms/libmodbus/distinfo
index c2b0667637d2..1c01472aee52 100644
--- a/comms/libmodbus/distinfo
+++ b/comms/libmodbus/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1751555493
-SHA256 (stephane-libmodbus-v3.1.11_GH0.tar.gz) = 8a750452ef86a53de6cec6fbca67bd5be08d0a1e87278a422fbce3003fd42d99
-SIZE (stephane-libmodbus-v3.1.11_GH0.tar.gz) = 207911
+TIMESTAMP = 1771064597
+SHA256 (stephane-libmodbus-v3.1.12_GH0.tar.gz) = 4151177f5223625c6be94230affb096aa8b1cdb0df00fe1f74ce53878a25d15d
+SIZE (stephane-libmodbus-v3.1.12_GH0.tar.gz) = 209399
diff --git a/comms/libmodbus/pkg-plist b/comms/libmodbus/pkg-plist
index 31d6a3334b83..132cfaae757f 100644
--- a/comms/libmodbus/pkg-plist
+++ b/comms/libmodbus/pkg-plist
@@ -1,79 +1,79 @@
 include/modbus/modbus-rtu.h
 include/modbus/modbus-tcp.h
 include/modbus/modbus-version.h
 include/modbus/modbus.h
 lib/libmodbus.so
 lib/libmodbus.so.5
 lib/libmodbus.so.5.1.0
 libdata/pkgconfig/libmodbus.pc
 %%MANPAGES%%share/man/man3/modbus_close.3.gz
 %%MANPAGES%%share/man/man3/modbus_connect.3.gz
 %%MANPAGES%%share/man/man3/modbus_disable_quirks.3.gz
 %%MANPAGES%%share/man/man3/modbus_enable_quirks.3.gz
 %%MANPAGES%%share/man/man3/modbus_flush.3.gz
 %%MANPAGES%%share/man/man3/modbus_free.3.gz
 %%MANPAGES%%share/man/man3/modbus_get_byte_from_bits.3.gz
 %%MANPAGES%%share/man/man3/modbus_get_byte_timeout.3.gz
 %%MANPAGES%%share/man/man3/modbus_get_float.3.gz
 %%MANPAGES%%share/man/man3/modbus_get_float_abcd.3.gz
 %%MANPAGES%%share/man/man3/modbus_get_float_badc.3.gz
 %%MANPAGES%%share/man/man3/modbus_get_float_cdab.3.gz
 %%MANPAGES%%share/man/man3/modbus_get_float_dcba.3.gz
 %%MANPAGES%%share/man/man3/modbus_get_header_length.3.gz
 %%MANPAGES%%share/man/man3/modbus_get_indication_timeout.3.gz
 %%MANPAGES%%share/man/man3/modbus_get_response_timeout.3.gz
 %%MANPAGES%%share/man/man3/modbus_get_slave.3.gz
 %%MANPAGES%%share/man/man3/modbus_get_socket.3.gz
 %%MANPAGES%%share/man/man3/modbus_mapping_free.3.gz
 %%MANPAGES%%share/man/man3/modbus_mapping_new.3.gz
 %%MANPAGES%%share/man/man3/modbus_mapping_new_start_address.3.gz
 %%MANPAGES%%share/man/man3/modbus_mask_write_register.3.gz
 %%MANPAGES%%share/man/man3/modbus_new_rtu.3.gz
 %%MANPAGES%%share/man/man3/modbus_new_tcp.3.gz
 %%MANPAGES%%share/man/man3/modbus_new_tcp_pi.3.gz
 %%MANPAGES%%share/man/man3/modbus_read_bits.3.gz
 %%MANPAGES%%share/man/man3/modbus_read_input_bits.3.gz
 %%MANPAGES%%share/man/man3/modbus_read_input_registers.3.gz
 %%MANPAGES%%share/man/man3/modbus_read_registers.3.gz
 %%MANPAGES%%share/man/man3/modbus_receive.3.gz
 %%MANPAGES%%share/man/man3/modbus_receive_confirmation.3.gz
 %%MANPAGES%%share/man/man3/modbus_reply.3.gz
 %%MANPAGES%%share/man/man3/modbus_reply_exception.3.gz
 %%MANPAGES%%share/man/man3/modbus_report_slave_id.3.gz
 %%MANPAGES%%share/man/man3/modbus_rtu_get_rts.3.gz
 %%MANPAGES%%share/man/man3/modbus_rtu_get_rts_delay.3.gz
 %%MANPAGES%%share/man/man3/modbus_rtu_get_serial_mode.3.gz
 %%MANPAGES%%share/man/man3/modbus_rtu_set_custom_rts.3.gz
 %%MANPAGES%%share/man/man3/modbus_rtu_set_rts.3.gz
 %%MANPAGES%%share/man/man3/modbus_rtu_set_rts_delay.3.gz
 %%MANPAGES%%share/man/man3/modbus_rtu_set_serial_mode.3.gz
 %%MANPAGES%%share/man/man3/modbus_send_raw_request.3.gz
 %%MANPAGES%%share/man/man3/modbus_send_raw_request_tid.3.gz
 %%MANPAGES%%share/man/man3/modbus_set_bits_from_byte.3.gz
 %%MANPAGES%%share/man/man3/modbus_set_bits_from_bytes.3.gz
 %%MANPAGES%%share/man/man3/modbus_set_byte_timeout.3.gz
 %%MANPAGES%%share/man/man3/modbus_set_debug.3.gz
 %%MANPAGES%%share/man/man3/modbus_set_error_recovery.3.gz
 %%MANPAGES%%share/man/man3/modbus_set_float.3.gz
 %%MANPAGES%%share/man/man3/modbus_set_float_abcd.3.gz
 %%MANPAGES%%share/man/man3/modbus_set_float_badc.3.gz
 %%MANPAGES%%share/man/man3/modbus_set_float_cdab.3.gz
 %%MANPAGES%%share/man/man3/modbus_set_float_dcba.3.gz
 %%MANPAGES%%share/man/man3/modbus_set_indication_timeout.3.gz
 %%MANPAGES%%share/man/man3/modbus_set_response_timeout.3.gz
 %%MANPAGES%%share/man/man3/modbus_set_slave.3.gz
 %%MANPAGES%%share/man/man3/modbus_set_socket.3.gz
 %%MANPAGES%%share/man/man3/modbus_strerror.3.gz
 %%MANPAGES%%share/man/man3/modbus_tcp_accept.3.gz
 %%MANPAGES%%share/man/man3/modbus_tcp_listen.3.gz
 %%MANPAGES%%share/man/man3/modbus_tcp_pi_accept.3.gz
 %%MANPAGES%%share/man/man3/modbus_tcp_pi_listen.3.gz
 %%MANPAGES%%share/man/man3/modbus_write_and_read_registers.3.gz
 %%MANPAGES%%share/man/man3/modbus_write_bit.3.gz
 %%MANPAGES%%share/man/man3/modbus_write_bits.3.gz
 %%MANPAGES%%share/man/man3/modbus_write_register.3.gz
 %%MANPAGES%%share/man/man3/modbus_write_registers.3.gz
 %%MANPAGES%%share/man/man7/libmodbus.7.gz
 %%PORTDOCS%%%%DOCSDIR%%/AUTHORS
-%%PORTDOCS%%%%DOCSDIR%%/NEWS
+%%PORTDOCS%%%%DOCSDIR%%/NEWS.md
 %%PORTDOCS%%%%DOCSDIR%%/README.md