diff --git a/science/py-arch/Makefile b/science/py-arch/Makefile
index ba88f5cb0c9c..c289667d6823 100644
--- a/science/py-arch/Makefile
+++ b/science/py-arch/Makefile
@@ -1,37 +1,37 @@
 PORTNAME=	arch
-DISTVERSION=	6.3.0
-PORTREVISION=	1
+DISTVERSION=	8.0.0
 CATEGORIES=	science finance python # economics
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Autoregressive Conditional Heteroskedasticity (ARCH) models
 WWW=		https://github.com/bashtage/arch
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE.md
 
-PY_DEPENDS=	${PYTHON_PKGNAMEPREFIX}numpy1>=1.16:math/py-numpy1@${PY_FLAVOR} \
-		${PYTHON_PKGNAMEPREFIX}pandas>=1.1:math/py-pandas@${PY_FLAVOR} \
-		${PYTHON_PKGNAMEPREFIX}property-cached>=1.6.4:devel/py-property-cached@${PY_FLAVOR}  \
-		${PYTHON_PKGNAMEPREFIX}scipy>=1.5:science/py-scipy@${PY_FLAVOR} \
-		${PYTHON_PKGNAMEPREFIX}statsmodels>=0.12:math/py-statsmodels@${PY_FLAVOR}
 BUILD_DEPENDS=	${PY_SETUPTOOLS} \
-		${PYTHON_PKGNAMEPREFIX}setuptools-scm>0:devel/py-setuptools-scm@${PY_FLAVOR} \
-		${PYTHON_PKGNAMEPREFIX}wheel>0:devel/py-wheel@${PY_FLAVOR} \
-		${PY_DEPENDS}
-RUN_DEPENDS=	${PY_DEPENDS}
+		${PYTHON_PKGNAMEPREFIX}wheel>0:devel/py-wheel@${PY_FLAVOR}
+BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}meson-python>0:devel/meson-python@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}numpy1>=1.16:math/py-numpy1@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}setuptools-scm>0:devel/py-setuptools-scm@${PY_FLAVOR}
+RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}numpy1>=1.16:math/py-numpy1@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}packaging>0:devel/py-packaging@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}pandas>=1.4.0:math/py-pandas@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}property-cached>=1.6.4:devel/py-property-cached@${PY_FLAVOR}  \
+		${PYTHON_PKGNAMEPREFIX}scipy>=1.8:science/py-scipy@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}statsmodels>=0.13.0:math/py-statsmodels@${PY_FLAVOR}
 
 USES=		python
 USE_PYTHON=	pep517 cython autoplist pytest # tests fail to run, see https://github.com/bashtage/arch/issues/668
 
 TEST_WRKSRC=	${WRKSRC}/arch/tests
 TEST_ENV=	${MAKE_ENV} PYTHONPATH=${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}
 
 post-install:
 	@${STRIP_CMD} \
 		${STAGEDIR}${PYTHON_SITELIBDIR}/arch/bootstrap/_samplers${PYTHON_TAG}.so \
 		${STAGEDIR}${PYTHON_SITELIBDIR}/arch/univariate/recursions${PYTHON_TAG}.so
 
 .include <bsd.port.mk>
diff --git a/science/py-arch/distinfo b/science/py-arch/distinfo
index 22dd62680692..749b725125b2 100644
--- a/science/py-arch/distinfo
+++ b/science/py-arch/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1704528706
-SHA256 (arch-6.3.0.tar.gz) = 6c56d8cb8a530723c68cb432bb9839490272c90614264d4ec241fe56b1fd96b7
-SIZE (arch-6.3.0.tar.gz) = 3736917
+TIMESTAMP = 1775852405
+SHA256 (arch-8.0.0.tar.gz) = 5e9895c2354b9475aff50797ff2191dc64dc5f79602baf0c9321310fb864b637
+SIZE (arch-8.0.0.tar.gz) = 872623
diff --git a/science/py-arch/files/patch-pyproject.toml b/science/py-arch/files/patch-pyproject.toml
index a1c3d77a2aa1..501f028d1020 100644
--- a/science/py-arch/files/patch-pyproject.toml
+++ b/science/py-arch/files/patch-pyproject.toml
@@ -1,13 +1,13 @@
---- pyproject.toml.orig	2023-09-27 08:13:24 UTC
+--- pyproject.toml.orig	2025-10-21 08:34:10 UTC
 +++ pyproject.toml
-@@ -54,8 +54,8 @@ requires = [
+@@ -3,8 +3,8 @@ requires = [
  requires = [
-   "setuptools>=61",
-   "wheel",
--  "setuptools_scm[toml]>=8.0.3,<9",
--  "oldest-supported-numpy>=2022.11.19",
-+  "setuptools_scm[toml]",
+   'meson-python',
+   "cython>=3.0.13,<4",  # Sync with CYTHON_MIN_VER in setup
+-  "numpy>=2.0.0,<3",
+-  "setuptools_scm>=9.2.0,<10",
 +  "numpy",
-   "cython>=0.29.34", # Works with 3.0.0b2
- 
++  "setuptools_scm",
  ]
+ 
+ [project]