diff --git a/net-mgmt/prometheus2/Makefile b/net-mgmt/prometheus2/Makefile
index 48d35d17d234..9814335f58c1 100644
--- a/net-mgmt/prometheus2/Makefile
+++ b/net-mgmt/prometheus2/Makefile
@@ -1,86 +1,85 @@
 PORTNAME=	prometheus
 DISTVERSIONPREFIX=	v
-DISTVERSION=	2.49.1
-PORTREVISION=	6
+DISTVERSION=	2.55.1
 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=	dor.bsd@xm0.uk
 COMMENT=	Systems monitoring and alerting toolkit
 WWW=		https://prometheus.io/
 
 LICENSE=	APACHE20
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 PATCH_DEPENDS=	bash:shells/bash
 
-USES=		cpe gmake go:modules
+USES=		cpe gmake go:1.23,modules
 
 USE_GITHUB=	yes
 USE_RC_SUBR=	prometheus
 
 GO_MODULE=	github.com/prometheus/prometheus
 GO_TARGET=	./cmd/prometheus ./cmd/promtool
 GO_BUILDFLAGS=	-a -v -ldflags "${LD_FLAG_STRING}" -tags netgo,builtinassets
 
 SUB_LIST+=	PROMETHEUS_CONSOLE_LIBRARIES_DIR=${PROMETHEUS_CONSOLE_LIBRARIES_DIR} \
 		PROMETHEUS_CONSOLES_DIR=${PROMETHEUS_CONSOLES_DIR} \
 		PROMETHEUS_DB_DIR=${PROMETHEUS_DB_DIR} \
 		PROMETHEUS_GROUP=${PROMETHEUS_GROUP} \
 		PROMETHEUS_USER=${PROMETHEUS_USER}
 
 USERS=		${PROMETHEUS_USER}
 GROUPS=		${PROMETHEUS_GROUP}
 
 PLIST_SUB+=	PROMETHEUS_CONSOLE_LIBRARIES_DIR=${PROMETHEUS_CONSOLE_LIBRARIES_DIR} \
 		PROMETHEUS_CONSOLES_DIR=${PROMETHEUS_CONSOLES_DIR} \
 		PROMETHEUS_GROUP=${PROMETHEUS_GROUP} \
 		PROMETHEUS_USER=${PROMETHEUS_USER}
 
 OPTIONS_DEFINE=	DOCS
 
 BUILD_USER?=		${USER}
 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} \
 			${LD_FLAG_X_PREFIX}.BuildDate=${SOURCE_DATE_EPOCH:U${SOURCE_DATE_EPOCH_CMD:sh}}
 LD_FLAG_X_PREFIX=	-X github.com/prometheus/common/version
 
 PROMETHEUS_CONSOLES_DIR?=		${DATADIR}/consoles
 PROMETHEUS_CONSOLE_LIBRARIES_DIR?=	${DATADIR}/console_libraries
 PROMETHEUS_DB_DIR?=			/var/db/${PORTNAME}
 PROMETHEUS_GROUP?=			prometheus
 PROMETHEUS_USER?=			prometheus
 
 # Bring DISTINFO_FILE into scope so we can get the timestamp.
 .include <bsd.port.pre.mk>
 
 SOURCE_DATE_EPOCH_CMD=	date -ur $$(${GREP} TIMESTAMP ${DISTINFO_FILE} | ${SED} -e 's/[^0-9]//g') \
 			'+%Y%m%d-%T'
 
 post-patch:
 	@${RM} -rf ${WRKSRC}/web/ui/static
 	# A symlink isn't good enough here, copy the entire static directory over
 	@${CP} -a ${WRKDIR}/static ${WRKSRC}/web/ui/static
 	@( cd ${WRKSRC} && ${WRKSRC}/scripts/compress_assets.sh )
 
 post-install:
 	${MKDIR} ${STAGEDIR}${DESTDIR}${PROMETHEUS_CONSOLES_DIR}
 	${MKDIR} ${STAGEDIR}${DESTDIR}${PROMETHEUS_CONSOLE_LIBRARIES_DIR}
 	${INSTALL_DATA} \
 		${WRKSRC}/documentation/examples/prometheus.yml \
 		${STAGEDIR}${LOCALBASE}/etc/prometheus.yml.sample
 	( cd ${WRKSRC}/console_libraries \
 		&& ${COPYTREE_SHARE} . ${STAGEDIR}${PROMETHEUS_CONSOLE_LIBRARIES_DIR} )
 	( cd ${WRKSRC}/consoles \
 		&& ${COPYTREE_SHARE} . ${STAGEDIR}${PROMETHEUS_CONSOLES_DIR} )
 
 post-install-DOCS-on:
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	@( cd ${WRKSRC}/docs \
 		&& ${COPYTREE_SHARE} . ${STAGEDIR}${DOCSDIR} )
 
 .include <bsd.port.post.mk>
diff --git a/net-mgmt/prometheus2/distinfo b/net-mgmt/prometheus2/distinfo
index f3f6a1d8d818..b3563a6b07c4 100644
--- a/net-mgmt/prometheus2/distinfo
+++ b/net-mgmt/prometheus2/distinfo
@@ -1,7 +1,7 @@
-TIMESTAMP = 1708263208
-SHA256 (go/net-mgmt_prometheus2/prometheus-prometheus-v2.49.1_GH0/go.mod) = 6ecc22e2c39aa282a5a4a03f3dab45decaa9232649d10dcdda1dfce513798ce1
-SIZE (go/net-mgmt_prometheus2/prometheus-prometheus-v2.49.1_GH0/go.mod) = 9568
-SHA256 (go/net-mgmt_prometheus2/prometheus-prometheus-v2.49.1_GH0/prometheus-web-ui-2.49.1.tar.gz) = 707333bbbfd6aae46f6c252502ce14e8facb3f83c08a07583b235bbf13687880
-SIZE (go/net-mgmt_prometheus2/prometheus-prometheus-v2.49.1_GH0/prometheus-web-ui-2.49.1.tar.gz) = 2419051
-SHA256 (go/net-mgmt_prometheus2/prometheus-prometheus-v2.49.1_GH0/prometheus-prometheus-v2.49.1_GH0.tar.gz) = 985d7f45ed3d16e23a30eae490c17911518fae96cba0245d493eb07097a10b3b
-SIZE (go/net-mgmt_prometheus2/prometheus-prometheus-v2.49.1_GH0/prometheus-prometheus-v2.49.1_GH0.tar.gz) = 6091825
+TIMESTAMP = 1731160271
+SHA256 (go/net-mgmt_prometheus2/prometheus-prometheus-v2.55.1_GH0/go.mod) = 9f4ce6feb314691b5570d0ce21dbbf91e40c47f82dd5e965c091e184ab0ad3d4
+SIZE (go/net-mgmt_prometheus2/prometheus-prometheus-v2.55.1_GH0/go.mod) = 10062
+SHA256 (go/net-mgmt_prometheus2/prometheus-prometheus-v2.55.1_GH0/prometheus-web-ui-2.55.1.tar.gz) = 2dbc4b277cb2261b91f015459c25eb8602ab3c9989a228cd9974b264dea45d41
+SIZE (go/net-mgmt_prometheus2/prometheus-prometheus-v2.55.1_GH0/prometheus-web-ui-2.55.1.tar.gz) = 2440633
+SHA256 (go/net-mgmt_prometheus2/prometheus-prometheus-v2.55.1_GH0/prometheus-prometheus-v2.55.1_GH0.tar.gz) = f48251f5c89eea6d3b43814499d558bacc4829265419ee69be49c5af98f79573
+SIZE (go/net-mgmt_prometheus2/prometheus-prometheus-v2.55.1_GH0/prometheus-prometheus-v2.55.1_GH0.tar.gz) = 6370113