diff --git a/devel/py-grpc-google-iam-v1/Makefile b/devel/py-grpc-google-iam-v1/Makefile
index 4768c47c618a..2be085be993b 100644
--- a/devel/py-grpc-google-iam-v1/Makefile
+++ b/devel/py-grpc-google-iam-v1/Makefile
@@ -1,26 +1,25 @@
 PORTNAME=	grpc-google-iam-v1
-PORTVERSION=	0.13.0
-PORTREVISION=	1
+PORTVERSION=	0.13.1
 CATEGORIES=	devel python
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	GRPC library for the google-iam-v1 service
 WWW=		https://github.com/googleapis/googleapis/tree/master/google/iam
 
 LICENSE=	APACHE20
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}setuptools>=0:devel/py-setuptools@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}wheel>=0:devel/py-wheel@${PY_FLAVOR}
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}googleapis-common-protos>=1.56.0<2.0.0:devel/py-googleapis-common-protos@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}grpcio>=1.44.0<2.0.0:devel/py-grpcio@${PY_FLAVOR} \
-		${PYTHON_PKGNAMEPREFIX}protobuf>=4.21.6,1:devel/py-protobuf@${PY_FLAVOR}
+		${PYTHON_PKGNAMEPREFIX}protobuf>=4.21.6,1<6.0.0,1:devel/py-protobuf@${PY_FLAVOR}
 
 USES=		python
 USE_PYTHON=	autoplist concurrent pep517
 
 NO_ARCH=	yes
 
 .include <bsd.port.mk>
diff --git a/devel/py-grpc-google-iam-v1/distinfo b/devel/py-grpc-google-iam-v1/distinfo
index bddf60083ced..7c0d919680c2 100644
--- a/devel/py-grpc-google-iam-v1/distinfo
+++ b/devel/py-grpc-google-iam-v1/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1702028104
-SHA256 (grpc-google-iam-v1-0.13.0.tar.gz) = fad318608b9e093258fbf12529180f400d1c44453698a33509cc6ecf005b294e
-SIZE (grpc-google-iam-v1-0.13.0.tar.gz) = 18178
+TIMESTAMP = 1720022804
+SHA256 (grpc-google-iam-v1-0.13.1.tar.gz) = 3ff4b2fd9d990965e410965253c0da6f66205d5a8291c4c31c6ebecca18a9001
+SIZE (grpc-google-iam-v1-0.13.1.tar.gz) = 17664