diff --git a/net-mgmt/alertmanager/Makefile b/net-mgmt/alertmanager/Makefile
index d69207d342a4..877ac6483aa5 100644
--- a/net-mgmt/alertmanager/Makefile
+++ b/net-mgmt/alertmanager/Makefile
@@ -1,30 +1,41 @@
 PORTNAME=	alertmanager
-PORTVERSION=	0.26.0
+PORTVERSION=	0.29.0
 DISTVERSIONPREFIX=	v
-PORTREVISION=	17
 CATEGORIES=	net-mgmt
 
-MAINTAINER=	michal@hanu.la
+MAINTAINER=	dutra@FreeBSD.org
 COMMENT=	Alert routing for Prometheus
 WWW=		https://prometheus.io/docs/alerting/alertmanager/
 
 LICENSE=	APACHE20
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 USES=		go:modules
 GO_MODULE=	github.com/prometheus/alertmanager
 
 USE_RC_SUBR=	alertmanager
 
 GO_TARGET=	./cmd/alertmanager ./cmd/amtool
 
 USERS=		alertmanager
 GROUPS=		alertmanager
 
+GO_BUILDFLAGS=	-v -ldflags "${LD_FLAG_STRING}"
+
+_BUILD_USER?=	${USER}
+_BUILD_DATE=	$$(date +%Y-%m-%d)
+LD_FLAG_STRING=	-s \
+		${LD_FLAG_X_PREFIX}.Version=${PORTVERSION} \
+		${LD_FLAG_X_PREFIX}.Revision=${PORTREVISION} \
+		${LD_FLAG_X_PREFIX}.Branch=release-${PORTVERSION:R} \
+		${LD_FLAG_X_PREFIX}.BuildUser=${_BUILD_USER} \
+		${LD_FLAG_X_PREFIX}.BuildDate=${_BUILD_DATE}
+LD_FLAG_X_PREFIX=	-X github.com/prometheus/common/version
+
 post-install:
 	@${MKDIR} ${STAGEDIR}${PREFIX}/etc/alertmanager
 	${INSTALL_DATA} \
 		${WRKSRC}/doc/examples/simple.yml \
 		${STAGEDIR}${PREFIX}/etc/alertmanager/alertmanager.yml.sample
 
 .include <bsd.port.mk>
diff --git a/net-mgmt/alertmanager/distinfo b/net-mgmt/alertmanager/distinfo
index a8a995031e4a..33a74a49133b 100644
--- a/net-mgmt/alertmanager/distinfo
+++ b/net-mgmt/alertmanager/distinfo
@@ -1,5 +1,5 @@
-TIMESTAMP = 1699953119
-SHA256 (go/net-mgmt_alertmanager/alertmanager-v0.26.0/v0.26.0.mod) = 35fe6445ebd86b668b9daa74130bd598493d5c55e081c01ddbbc0d195534c221
-SIZE (go/net-mgmt_alertmanager/alertmanager-v0.26.0/v0.26.0.mod) = 3798
-SHA256 (go/net-mgmt_alertmanager/alertmanager-v0.26.0/v0.26.0.zip) = 7666007c7ccec339fd09aaeec1d15c5b8c26cb01d387c9a9f7273f904db825b0
-SIZE (go/net-mgmt_alertmanager/alertmanager-v0.26.0/v0.26.0.zip) = 2422183
+TIMESTAMP = 1762584597
+SHA256 (go/net-mgmt_alertmanager/alertmanager-v0.29.0/v0.29.0.mod) = 60c6ffa33fb66b8fdef81ef30a0c953df1c0776bf59a3376ec4d8fa8f250405a
+SIZE (go/net-mgmt_alertmanager/alertmanager-v0.29.0/v0.29.0.mod) = 5779
+SHA256 (go/net-mgmt_alertmanager/alertmanager-v0.29.0/v0.29.0.zip) = 3fa76af529268a74b5dd8e9651fdf0d16484b25539f2af3e07a0a196d4097793
+SIZE (go/net-mgmt_alertmanager/alertmanager-v0.29.0/v0.29.0.zip) = 3193645