diff --git a/math/py-yt/Makefile b/math/py-yt/Makefile
index fef9b107c107..c8225d137dc8 100644
--- a/math/py-yt/Makefile
+++ b/math/py-yt/Makefile
@@ -1,49 +1,50 @@
 PORTNAME=	yt
-DISTVERSION=	4.2.0
+DISTVERSION=	4.3.0
 CATEGORIES=	math astro python
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Analysis and visualization toolkit for volumetric data
 WWW=		https://yt-project.org/
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/COPYING.txt
 
 # dependencies are in setup.cfg
 BUILD_DEPENDS=	${PYNUMPY} \
 		${PYTHON_PKGNAMEPREFIX}ewah-bool-utils>=1.0.2:devel/py-ewah-bool-utils@${PY_FLAVOR}
+BUILD_DEPENDS+=	${PYTHON_PKGNAMEPREFIX}cython3>0:lang/cython3
 RUN_DEPENDS=	\
 		${PYNUMPY} \
 		${PYTHON_PKGNAMEPREFIX}cmyt>=0.2.2:math/py-cmyt@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}ewah-bool-utils>=1.0.2:devel/py-ewah-bool-utils@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}ipywidgets>0:devel/py-ipywidgets@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}ipython>=1.0:devel/ipython@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}matplotlib>0:math/py-matplotlib@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}more-itertools>=8.4:devel/py-more-itertools@${PY_FLAVOR} \
 		${PYNUMPY} \
 		${PYTHON_PKGNAMEPREFIX}packaging>=20.9:devel/py-packaging@${PY_FLAVOR} \
 		${PY_PILLOW} \
 		${PYTHON_PKGNAMEPREFIX}pyparsing>=2.0.2:devel/py-pyparsing@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}sympy>=1.2:math/py-sympy@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}toml>=0.10.2:textproc/py-toml@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}tomli-w>=0.4.0:textproc/py-tomli-w@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}tqdm>=3.4.0:misc/py-tqdm@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}unyt>=2.8.0:math/py-unyt@${PY_FLAVOR}
 
 USES=		dos2unix localbase python
-USE_PYTHON=	distutils cython autoplist concurrent
+USE_PYTHON=	distutils autoplist concurrent # cython, but cython3 isn't yet available
 
 post-patch:
 	@${REINPLACE_CMD} -e "s|check_for_pyembree() is not None|False|" \
 		${WRKSRC}/setup.py
 	@${REINPLACE_CMD} -e "s|check_for_openmp() is True|True|" \
 		${WRKSRC}/setup.py
 	@${REINPLACE_CMD} -e "s|\['-fopenmp', filename\]|['-I${LOCALBASE}/include', '-L${LOCALBASE}/lib', '-lm', '-fopenmp', filename]|" \
 		${WRKSRC}/setupext.py
 
 post-install:
 	@${STRIP_CMD} $$(${FIND} ${STAGEDIR}${PYTHON_SITELIBDIR} -name "*.so")
 
 .include <bsd.port.mk>
diff --git a/math/py-yt/distinfo b/math/py-yt/distinfo
index ae56f8bb31ce..6e73e4d5407d 100644
--- a/math/py-yt/distinfo
+++ b/math/py-yt/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1685291256
-SHA256 (yt-4.2.0.tar.gz) = ed518bab672a84ff4c145a27654f6c7b1c91632062a223592e15ee558779db26
-SIZE (yt-4.2.0.tar.gz) = 11711735
+TIMESTAMP = 1699029447
+SHA256 (yt-4.3.0.tar.gz) = cdcab7c07d8c46fe87d94fcec4bbac750394aa40b88cb7381abc843dcdce30ee
+SIZE (yt-4.3.0.tar.gz) = 13706721