diff --git a/devel/py-oslo.serialization/Makefile b/devel/py-oslo.serialization/Makefile
index 82790460f255..8a6c3dd7d97c 100644
--- a/devel/py-oslo.serialization/Makefile
+++ b/devel/py-oslo.serialization/Makefile
@@ -1,28 +1,27 @@
 PORTNAME=	oslo.serialization
-PORTVERSION=	5.6.0
+PORTVERSION=	5.10.0
 CATEGORIES=	devel python
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
+DISTNAME=	oslo_serialization-${PORTVERSION}
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Oslo Serialization library
 WWW=		https://docs.openstack.org/oslo.serialization/latest/ \
 		https://github.com/openstack/oslo.serialization
 
 LICENSE=	APACHE20
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
-BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pbr>=2.0.0:devel/py-pbr@${PY_FLAVOR} \
+BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pbr>=6.1.1:devel/py-pbr@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}setuptools>=0:devel/py-setuptools@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}wheel>=0:devel/py-wheel@${PY_FLAVOR}
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}msgpack>=0.5.2:devel/py-msgpack@${PY_FLAVOR} \
-		${PYTHON_PKGNAMEPREFIX}oslo.utils>=3.33.0:devel/py-oslo.utils@${PY_FLAVOR} \
-		${PYTHON_PKGNAMEPREFIX}pbr>=2.0.0:devel/py-pbr@${PY_FLAVOR} \
-		${PYTHON_PKGNAMEPREFIX}tzdata>=2022.4:devel/py-tzdata@${PY_FLAVOR}
+		${PYTHON_PKGNAMEPREFIX}oslo.utils>=3.33.0:devel/py-oslo.utils@${PY_FLAVOR}
 
 USES=		python
 USE_PYTHON=	autoplist concurrent pep517
 
 NO_ARCH=	yes
 
 .include <bsd.port.mk>
diff --git a/devel/py-oslo.serialization/distinfo b/devel/py-oslo.serialization/distinfo
index 3398b18cc60c..f814c5d2cffb 100644
--- a/devel/py-oslo.serialization/distinfo
+++ b/devel/py-oslo.serialization/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1732260932
-SHA256 (oslo.serialization-5.6.0.tar.gz) = 4c7d4e12da853cc4f04b9123041134e886e8c9ff57ab57c1962d3ad4a87b7f7c
-SIZE (oslo.serialization-5.6.0.tar.gz) = 35308
+TIMESTAMP = 1779455597
+SHA256 (oslo_serialization-5.10.0.tar.gz) = 79a71cde2651afd5dc7f065a56e4a100a4d4127ef1b17f798a6d09cea24976b6
+SIZE (oslo_serialization-5.10.0.tar.gz) = 37183
diff --git a/devel/py-oslo.serialization/files/patch-pyproject.toml b/devel/py-oslo.serialization/files/patch-pyproject.toml
new file mode 100644
index 000000000000..b7342a89dc63
--- /dev/null
+++ b/devel/py-oslo.serialization/files/patch-pyproject.toml
@@ -0,0 +1,11 @@
+--- pyproject.toml.orig	2026-05-18 09:17:17 UTC
++++ pyproject.toml
+@@ -9,7 +9,7 @@ authors = [
+ authors = [
+     {name = "OpenStack", email = "openstack-discuss@lists.openstack.org"},
+ ]
+-license = "Apache-2.0"
++license = {text = "Apache-2.0"}
+ requires-python = ">=3.10"
+ dynamic = ["version", "dependencies"]
+ classifiers = [