diff --git a/net-mgmt/alertmanager/Makefile b/net-mgmt/alertmanager/Makefile
index 6b589ddb94fa..837f882f9cd2 100644
--- a/net-mgmt/alertmanager/Makefile
+++ b/net-mgmt/alertmanager/Makefile
@@ -1,42 +1,51 @@
 PORTNAME=	alertmanager
-PORTVERSION=	0.31.1
+PORTVERSION=	0.33.0
 DISTVERSIONPREFIX=	v
-PORTREVISION=	3
 CATEGORIES=	net-mgmt
+MASTER_SITES=	https://raw.githubusercontent.com/${GH_ACCOUNT}/${GH_PROJECT}/${DISTVERSIONFULL}/:gomod \
+		https://github.com/${GH_ACCOUNT}/${GH_PROJECT}/releases/download/${DISTVERSIONFULL}/:ui
+DISTFILES=	go.mod:gomod \
+		${PORTNAME}-web-ui-${DISTVERSION}.tar.gz:ui
 
 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
+USES=		cpe go:modules
 GO_MODULE=	github.com/prometheus/alertmanager
 
+USE_GITHUB=	yes
+GH_ACCOUNT=	prometheus
 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-patch:
+	@${RM} -rf ${WRKSRC}/web/ui/static
+	@${CP} -a ${WRKDIR}/dist ${WRKSRC}/ui/app/dist
+
 post-install:
 	@${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 1ae51cd850d6..3f9d9b2060fa 100644
--- a/net-mgmt/alertmanager/distinfo
+++ b/net-mgmt/alertmanager/distinfo
@@ -1,5 +1,7 @@
-TIMESTAMP = 1773552037
-SHA256 (go/net-mgmt_alertmanager/alertmanager-v0.31.1/v0.31.1.mod) = ff0d16a2f76179f2f1738fb880d02f8068c9e807c67d6b57da3d3c68343cf569
-SIZE (go/net-mgmt_alertmanager/alertmanager-v0.31.1/v0.31.1.mod) = 6554
-SHA256 (go/net-mgmt_alertmanager/alertmanager-v0.31.1/v0.31.1.zip) = b40fd29944ac8b3633716faea09214c91d18ac96307675aef1e7363c344cafb6
-SIZE (go/net-mgmt_alertmanager/alertmanager-v0.31.1/v0.31.1.zip) = 2892531
+TIMESTAMP = 1782188999
+SHA256 (go/net-mgmt_alertmanager/prometheus-alertmanager-v0.33.0_GH0/go.mod) = 00ca4933e1f009a4c968a79d1e9638a88e95d2a668bb6cb78722f40510ffc0f1
+SIZE (go/net-mgmt_alertmanager/prometheus-alertmanager-v0.33.0_GH0/go.mod) = 6376
+SHA256 (go/net-mgmt_alertmanager/prometheus-alertmanager-v0.33.0_GH0/alertmanager-web-ui-0.33.0.tar.gz) = 995891e2ed390110a063f10ac7320d2146a343dbd5ea74431b79a0cc313ac133
+SIZE (go/net-mgmt_alertmanager/prometheus-alertmanager-v0.33.0_GH0/alertmanager-web-ui-0.33.0.tar.gz) = 931683
+SHA256 (go/net-mgmt_alertmanager/prometheus-alertmanager-v0.33.0_GH0/prometheus-alertmanager-v0.33.0_GH0.tar.gz) = 99d24655565e1be74d6fff3ebb3b80d6a0bec2a587c84c3c4690949b82908758
+SIZE (go/net-mgmt_alertmanager/prometheus-alertmanager-v0.33.0_GH0/prometheus-alertmanager-v0.33.0_GH0.tar.gz) = 775944