Index: head/net-mgmt/prometheus/Makefile
===================================================================
--- head/net-mgmt/prometheus/Makefile	(revision 452786)
+++ head/net-mgmt/prometheus/Makefile	(revision 452787)
@@ -1,39 +1,39 @@
 # Created by: Jev Björsell <ports@ecadlabs.com>
 # $FreeBSD$
 
 PORTNAME=	prometheus
-PORTVERSION=	1.7.1
+PORTVERSION=	1.8.1
 DISTVERSIONPREFIX=	v
 CATEGORIES=	net-mgmt
 
 MAINTAINER=	ports@ecadlabs.com
 COMMENT=	Systems monitoring and alerting toolkit
 
 LICENSE=	APACHE20
 
 USES=		go gmake
 USE_GITHUB=	yes
 
 GO_PKGNAME=	github.com/${PORTNAME}/${PORTNAME}
 
 USE_RC_SUBR=	prometheus
 
 USERS=		prometheus
 GROUPS=		prometheus
 
 LD_FLAG_STRING=	${GO_PKGNAME}/vendor/github.com/prometheus/common/version.
 do-build:
 	(cd ${GO_WRKSRC}/cmd/prometheus ; ${SETENV} ${GO_ENV} go install -ldflags \
 	    "-s -X ${LD_FLAG_STRING}.Version=${PORTVERSION}")
 
 	(cd ${GO_WRKSRC}/cmd/promtool ; ${SETENV} ${GO_ENV} go install -ldflags \
 	    "-s -X ${LD_FLAG_STRING}.Version=${PORTVERSION}")
 
 do-install:
 	${INSTALL_PROGRAM} ${GO_WRKDIR_BIN}/prometheus ${STAGEDIR}${PREFIX}/bin
 	${INSTALL_PROGRAM} ${GO_WRKDIR_BIN}/promtool ${STAGEDIR}${PREFIX}/bin
 	${INSTALL_DATA} ${WRKSRC}/documentation/examples/prometheus.yml ${STAGEDIR}${LOCALBASE}/etc/prometheus.yml.sample
 
 	${MKDIR} ${STAGEDIR}${DESTDIR}/var/db/prometheus
 
 .include <bsd.port.mk>
Index: head/net-mgmt/prometheus/distinfo
===================================================================
--- head/net-mgmt/prometheus/distinfo	(revision 452786)
+++ head/net-mgmt/prometheus/distinfo	(revision 452787)
@@ -1,3 +1,3 @@
-TIMESTAMP = 1497637077
-SHA256 (prometheus-prometheus-v1.7.1_GH0.tar.gz) = 209832310f5bef99faef3beaaa95263612a4d0126ca512c4a4c23a8543d3ccf5
-SIZE (prometheus-prometheus-v1.7.1_GH0.tar.gz) = 5122747
+TIMESTAMP = 1508862558
+SHA256 (prometheus-prometheus-v1.8.1_GH0.tar.gz) = dc2b7bb5b5f1273c131921d3e306fd198f2a5547abc58dcf511b700c62963595
+SIZE (prometheus-prometheus-v1.8.1_GH0.tar.gz) = 5194859