diff --git a/multimedia/mkvtoolnix/Makefile b/multimedia/mkvtoolnix/Makefile
index 9e122e5a18be..882bb2c3dfdd 100644
--- a/multimedia/mkvtoolnix/Makefile
+++ b/multimedia/mkvtoolnix/Makefile
@@ -1,91 +1,91 @@
 PORTNAME=	mkvtoolnix
-PORTVERSION=	80.0
+PORTVERSION=	81.0
 CATEGORIES=	multimedia audio
 MASTER_SITES=	https://www.bunkus.org/videotools/mkvtoolnix/sources/ \
 		https://mkvtoolnix.download/sources/
 
 MAINTAINER=	riggs@FreeBSD.org
 COMMENT=	Tools to extract from/get info about/create Matroska media streams
 WWW=		https://www.bunkus.org/videotools/mkvtoolnix/
 
 LICENSE=	GPLv2
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 BROKEN_sparc64=	does not install
 
 BUILD_DEPENDS=	rake:devel/rubygem-rake \
 		docbook-xsl>=0:textproc/docbook-xsl \
 		xsltproc:textproc/libxslt
 LIB_DEPENDS=	libvorbis.so:audio/libvorbis \
 		libogg.so:audio/libogg \
 		libebml.so:textproc/libebml \
-		libboost_regex.so:devel/boost-libs \
+		libboost_system.so:devel/boost-libs \
 		libpugixml.so:textproc/pugixml \
 		libmatroska.so:multimedia/libmatroska \
 		libcmark.so:textproc/cmark \
 		libgmp.so:math/gmp
 
 FLAVORS=	qt5 nogui
 FLAVOR?=	${FLAVORS:[1]}
 nogui_PKGNAMESUFFIX=	-nogui
 nogui_CONFLICTS_INSTALL=mkvtoolnix
 qt5_CONFLICTS_INSTALL=	mkvtoolnix-nogui
 
 USES=		${_USES_${FLAVOR}}
 USE_QT=		${_USE_QT_${FLAVOR}}
 
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS=	--with-boost=${LOCALBASE} \
 		--with-docbook-xsl-root=${PREFIX}/share/xsl/docbook \
 		--disable-qt6 ${_CONFIGURE_ARGS_${FLAVOR}}
 MAKE_ENV=	V=1
 MAKE_CMD=	rake -v
 MAKEFILE=	Rakefile
 ALL_TARGET=	#Empty
 
 BINARY_ALIAS=	qmake=${QMAKE} \
 		lconvert=${LCONVERT} \
 		moc=${MOC} \
 		rcc=${RCC} \
 		uic=${UIC}
 
 # Flavor handling
 _USES_qt5=		compiler:c++17-lang desktop-file-utils iconv localbase \
 			pkgconfig qmake:no_env qt:5 shared-mime-info tar:xz
 _USE_QT_qt5=		buildtools:build concurrent core dbus declarative gui \
 			linguisttools:build multimedia network svg widgets
 _PLIST_SUB_qt5=		GUI=
 _CONFIGURE_ARGS_nogui=	--disable-gui
 _USES_nogui=		compiler:c++17-lang iconv localbase pkgconfig qmake:no_env \
 			qt:5 tar:xz
 _USE_QT_nogui=		buildtools:build core linguisttools:build \
 			multimedia:build
 _PLIST_SUB_nogui=	GUI="@comment "
 
 PLIST_SUB+=		${_PLIST_SUB_${FLAVOR}}
 
 # Options handling
 OPTIONS_DEFINE=	DVDREAD FLAC NLS MANTRANS
 OPTIONS_DEFAULT=	FLAC
 OPTIONS_SUB=	yes
 
 DVDREAD_DESC=		Support reading DVD chapters via libdvdread
 DVDREAD_LIB_DEPENDS=	libdvdread.so:multimedia/libdvdread
 DVDREAD_CONFIGURE_WITH=	dvdread
 
 FLAC_LIB_DEPENDS=	libFLAC.so:audio/flac
 FLAC_CONFIGURE_WITH=	flac
 
 NLS_USES=	gettext
 NLS_CONFIGURE_WITH=	gettext
 
 MANTRANS_DESC=		Build and install manpage translations
 MANTRANS_BUILD_DEPENDS=	po4a:textproc/po4a
 
 .include <bsd.port.pre.mk>
 
 .if ${CHOSEN_COMPILER_TYPE} != clang
 USE_CXXSTD=	c++17
 .endif
 
 .include <bsd.port.post.mk>
diff --git a/multimedia/mkvtoolnix/distinfo b/multimedia/mkvtoolnix/distinfo
index 9abb0d0e9d15..4a06693ef5c5 100644
--- a/multimedia/mkvtoolnix/distinfo
+++ b/multimedia/mkvtoolnix/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1698660719
-SHA256 (mkvtoolnix-80.0.tar.xz) = bb08cdaf9afd472738b9655ae5704c3749da0a51a188baab12f5d7c3eb4d33f5
-SIZE (mkvtoolnix-80.0.tar.xz) = 11056764
+TIMESTAMP = 1702796228
+SHA256 (mkvtoolnix-81.0.tar.xz) = 422f2bec88d5d93547df0c3e1399272a6dc4c23050b45d34343bbdd6d55e5ad6
+SIZE (mkvtoolnix-81.0.tar.xz) = 11067288