diff --git a/sysutils/mackerel-agent/Makefile b/sysutils/mackerel-agent/Makefile
index 8d9c6fe563aa..60e0c7727457 100644
--- a/sysutils/mackerel-agent/Makefile
+++ b/sysutils/mackerel-agent/Makefile
@@ -1,27 +1,26 @@
 PORTNAME=	mackerel-agent
 DISTVERSIONPREFIX=	v
-DISTVERSION=	0.85.0
-PORTREVISION=	5
+DISTVERSION=	0.85.1
 CATEGORIES=	sysutils
 
 MAINTAINER=	meta@FreeBSD.org
 COMMENT=	Agent program to post your hosts' metrics to mackerel.io
 WWW=		https://mackerel.io
 
 LICENSE=	APACHE20
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 USES=		go:modules,1.24
 USE_RC_SUBR=	mackerel_agent
 GO_MODULE=	github.com/mackerelio/mackerel-agent
 
 post-patch:
 	${REINPLACE_CMD} -e "s|/etc|${PREFIX}/etc|" ${WRKSRC}/config/config_unix.go
 
 post-stage:
 	${MKDIR} ${STAGEDIR}${ETCDIR}
 	${INSTALL_DATA} ${WRKSRC}/mackerel-agent.sample.conf ${STAGEDIR}${ETCDIR}
 	${MV} ${STAGEDIR}${ETCDIR}/mackerel-agent.sample.conf \
 		${STAGEDIR}${ETCDIR}/mackerel-agent.conf.sample
 
 .include <bsd.port.mk>
diff --git a/sysutils/mackerel-agent/distinfo b/sysutils/mackerel-agent/distinfo
index 7e4f16e5dbf4..08541aa80148 100644
--- a/sysutils/mackerel-agent/distinfo
+++ b/sysutils/mackerel-agent/distinfo
@@ -1,5 +1,5 @@
-TIMESTAMP = 1747657942
-SHA256 (go/sysutils_mackerel-agent/mackerel-agent-v0.85.0/v0.85.0.mod) = 0bfbbbc63923dac1522431f7c16a7893a055cfe0b06658a36d80cf0d28fd2aad
-SIZE (go/sysutils_mackerel-agent/mackerel-agent-v0.85.0/v0.85.0.mod) = 1950
-SHA256 (go/sysutils_mackerel-agent/mackerel-agent-v0.85.0/v0.85.0.zip) = 2b8259c37217448553d2a6bed2df7ba2ae37bd076fdc5ca06d5743d5cbc48235
-SIZE (go/sysutils_mackerel-agent/mackerel-agent-v0.85.0/v0.85.0.zip) = 251809
+TIMESTAMP = 1758117065
+SHA256 (go/sysutils_mackerel-agent/mackerel-agent-v0.85.1/v0.85.1.mod) = 37ea7c0a4ed46cd5242af0e0a8e5833058454efa3bde291882825f9d8def60f7
+SIZE (go/sysutils_mackerel-agent/mackerel-agent-v0.85.1/v0.85.1.mod) = 1426
+SHA256 (go/sysutils_mackerel-agent/mackerel-agent-v0.85.1/v0.85.1.zip) = f2e1b57cd96df7d95d168f6aec196234595682b44b7b0b747ecc8003fdb7f8cf
+SIZE (go/sysutils_mackerel-agent/mackerel-agent-v0.85.1/v0.85.1.zip) = 250400