diff --git a/devel/py-openstacksdk/Makefile b/devel/py-openstacksdk/Makefile
index 86751ec4caa5..2f138318a2ed 100644
--- a/devel/py-openstacksdk/Makefile
+++ b/devel/py-openstacksdk/Makefile
@@ -1,37 +1,37 @@
 PORTNAME=	openstacksdk
-PORTVERSION=	4.18.0
+PORTVERSION=	4.20.0
 CATEGORIES=	devel python
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	SDK for building applications to work with OpenStack
 WWW=		https://docs.openstack.org/openstacksdk/latest/ \
 		https://github.com/openstack/openstacksdk
 
 LICENSE=	APACHE20
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 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=	${PYTHON_PKGNAMEPREFIX}decorator>=4.4.1:devel/py-decorator@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}dogpile.cache>=0.6.5:devel/py-dogpile.cache@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}iso8601>=0.1.11:devel/py-iso8601@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}jmespath>=0.9.0:devel/py-jmespath@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}jsonpatch>=1.16:devel/py-jsonpatch@${PY_FLAVOR} \
-		${PYTHON_PKGNAMEPREFIX}keystoneauth1>=5.10.0:devel/py-keystoneauth1@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}keystoneauth1>=5.16.0:devel/py-keystoneauth1@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}os-service-types>=1.8.1:devel/py-os-service-types@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}pbr>=2.0.0:devel/py-pbr@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}platformdirs>=3:devel/py-platformdirs@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}psutil>=3.2.2:sysutils/py-psutil@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}pyyaml>=3.13:devel/py-pyyaml@${PY_FLAVOR}
 
 USES=		python:3.11+ shebangfix
 USE_PYTHON=	autoplist concurrent cryptography pep517
 
 NO_ARCH=	yes
 
 SHEBANG_GLOB=	*.sh
 
 .include <bsd.port.mk>
diff --git a/devel/py-openstacksdk/distinfo b/devel/py-openstacksdk/distinfo
index ba14e247297c..709f0f378b7f 100644
--- a/devel/py-openstacksdk/distinfo
+++ b/devel/py-openstacksdk/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1787587870
-SHA256 (openstacksdk-4.18.0.tar.gz) = 466f2f869bcf6dec717a5e6c65c0522b1bd061d53310c7bf11982e0d9244f70c
-SIZE (openstacksdk-4.18.0.tar.gz) = 1403478
+TIMESTAMP = 1788500126
+SHA256 (openstacksdk-4.20.0.tar.gz) = f533050d7441b6d41c53488434d2f2df79f1f963a4b431695b4c7f49380ea85c
+SIZE (openstacksdk-4.20.0.tar.gz) = 1440710
diff --git a/devel/py-openstacksdk/files/patch-pyproject.toml b/devel/py-openstacksdk/files/patch-pyproject.toml
index a78a23e3ecde..fd64be6543e8 100644
--- a/devel/py-openstacksdk/files/patch-pyproject.toml
+++ b/devel/py-openstacksdk/files/patch-pyproject.toml
@@ -1,11 +1,11 @@
---- pyproject.toml.orig	2026-05-18 09:35:04 UTC
+--- pyproject.toml.orig	2026-09-01 00:21:56 UTC
 +++ pyproject.toml
 @@ -9,7 +9,7 @@ readme = {file = "README.rst", content-type = "text/x-
      {name = "OpenStack", email = "openstack-discuss@lists.openstack.org"},
  ]
  readme = {file = "README.rst", content-type = "text/x-rst"}
 -license = "Apache-2.0"
 +license = {text = "Apache-2.0"}
- dynamic = ["version", "dependencies"]
- requires-python = ">=3.10"
- classifiers = [
+ dynamic = ["version"]
+ dependencies = [
+     "cryptography>=2.7", # BSD/Apache-2.0