diff --git a/devel/py-pydantic-yaml/Makefile b/devel/py-pydantic-yaml/Makefile
index 75dac0ad3999..9f23bd35847b 100644
--- a/devel/py-pydantic-yaml/Makefile
+++ b/devel/py-pydantic-yaml/Makefile
@@ -1,30 +1,31 @@
 PORTNAME=	pydantic-yaml
 PORTVERSION=	1.2.0
+PORTREVISION=	1
 CATEGORIES=	devel python
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 DISTNAME=	pydantic_yaml-${PORTVERSION}
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Add some YAML functionality to the excellent pydantic library
 WWW=		https://pydantic-yaml.readthedocs.io/en/latest/ \
 		https://github.com/NowanIlfideme/pydantic-yaml
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}importlib-metadata>=4.2.0:devel/py-importlib-metadata@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}setuptools>=61.0.0:devel/py-setuptools@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}setuptools_scm>=6.2:devel/py-setuptools_scm@${PY_FLAVOR}  \
 		${PYTHON_PKGNAMEPREFIX}wheel>=0:devel/py-wheel@${PY_FLAVOR}
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}importlib-metadata>=0:devel/py-importlib-metadata@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}pydantic2>=2.0.0:devel/py-pydantic2@${PY_FLAVOR} \
-		${PYTHON_PKGNAMEPREFIX}ruamel.yaml>=0.16.0<0.18.0:devel/py-ruamel.yaml@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}ruamel.yaml>=0.16.0<0.19.0:devel/py-ruamel.yaml@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}typing-extensions>=4.5.0:devel/py-typing-extensions@${PY_FLAVOR}
 
 USES=		python
 USE_PYTHON=	autoplist concurrent pep517
 
 NO_ARCH=	yes
 
 .include <bsd.port.mk>
diff --git a/devel/py-pydantic-yaml/files/patch-pyproject.toml b/devel/py-pydantic-yaml/files/patch-pyproject.toml
new file mode 100644
index 000000000000..42c369297298
--- /dev/null
+++ b/devel/py-pydantic-yaml/files/patch-pyproject.toml
@@ -0,0 +1,11 @@
+--- pyproject.toml.orig	2023-09-25 18:54:10 UTC
++++ pyproject.toml
+@@ -26,7 +26,7 @@ classifiers = [
+ ]
+ dependencies = [
+     "pydantic>=1.8",               # including pydantic>=2.0.0!
+-    "ruamel.yaml>=0.16.0,<0.18.0", # recommended ~=0.17.21
++    "ruamel.yaml>=0.16.0,<0.19.0", # recommended ~=0.17.21
+     "importlib_metadata",
+     "typing_extensions>=4.5.0",
+ ]