diff --git a/textproc/libkolabxml/Makefile b/textproc/libkolabxml/Makefile
index 305353a8e622..369beeb4e540 100644
--- a/textproc/libkolabxml/Makefile
+++ b/textproc/libkolabxml/Makefile
@@ -1,43 +1,46 @@
 PORTNAME=	libkolabxml
 DISTVERSION=	1.3.1
-PORTREVISION=	6
+PORTREVISION=	8
 CATEGORIES=	textproc
 MASTER_SITES=	LOCAL/kde/${PORTNAME}
 DIST_SUBDIR=	${PORTNAME}
 
 MAINTAINER=	kde@FreeBSD.org
 COMMENT=	Kolab XML Format Schema Definitions Library
 WWW=		https://kolab.org/
 
 # The XSD schemas in schemas/ are APACHE20-licensed, and some files
 # are in public domain. The library itself and the installed headers
 # are considered LGPL3-licensed, though.
 LICENSE=	LGPL3+
 
+DEPRECATED=	Has no consumers in Ports, does not build with CMake 4
+EXPIRATION_DATE=2026-11-30
+
 BUILD_DEPENDS=	libxsd>=4.2.0:devel/libxsd \
 		xsdcxx:devel/xsd
 LIB_DEPENDS=	libboost_thread.so:devel/boost-libs \
 		libcurl.so:ftp/curl \
 		libxerces-c.so:textproc/xerces-c3
 
 USES=		cmake tar:xz
 USE_LDCONFIG=	yes
 
 # TODO: Conditionally enable the bindings based on OPTIONs.
 CMAKE_OFF=	BUILD_TESTS \
 		BUILD_UTILS \
 		CSHARP_BINDINGS \
 		DIST_ONLY \
 		JAVA_BINDINGS \
 		PHP_BINDINGS \
 		PYTHON_BINDINGS
 
 PLIST_SUB=	SHLIB_VER=${PORTVERSION}
 
 create-distfile:
 	${MKDIR} ${DISTDIR}/${DIST_SUBDIR}
 	${SH} ${FILESDIR}/create_libkolabxml_release.sh \
 		${DISTDIR}/${DIST_SUBDIR} \
 		${DISTVERSIONFULL}
 
 .include <bsd.port.mk>