diff --git a/math/py-slepc4py/Makefile b/math/py-slepc4py/Makefile
index f386fff54610..0e41e2c19c6d 100644
--- a/math/py-slepc4py/Makefile
+++ b/math/py-slepc4py/Makefile
@@ -1,32 +1,33 @@
 PORTNAME=	slepc4py
-DISTVERSION=	3.19.2
+DISTVERSION=	3.20.0
 CATEGORIES=	math python
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	SLEPc for Python
 WWW=		https://bitbucket.org/slepc/slepc4py
 
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE.rst
 
 PY_DEPENDS=	${PYNUMPY} \
 		${PYTHON_PKGNAMEPREFIX}petsc4py>0:math/py-petsc4py@${PY_FLAVOR}
-BUILD_DEPENDS=	${PY_DEPENDS}
+BUILD_DEPENDS=	${PY_DEPENDS} \
+		${PYTHON_PKGNAMEPREFIX}cython3>0:lang/cython3
 RUN_DEPENDS=	${PY_DEPENDS}
 LIB_DEPENDS=	libmpich.so:net/mpich \
 		libpetsc.so:science/PETSc \
 		libslepc.so:math/slepc
 RUN_DEPENDS=	${PYNUMPY}
 
 USES=		fortran python
-USE_PYTHON=	distutils cython autoplist pytest
+USE_PYTHON=	distutils autoplist pytest
 
 MAKE_ENV=	PETSC_DIR=${LOCALBASE} SLEPC_DIR=${LOCALBASE}
 TEST_ENV=	${MAKE_ENV} PYTHONPATH=${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}
 
 post-install:
 	@${STRIP_CMD} ${STAGEDIR}${PYTHON_SITELIBDIR}/slepc4py/lib/SLEPc${PYTHON_EXT_SUFFIX}.so
 
 .include <bsd.port.mk>
diff --git a/math/py-slepc4py/distinfo b/math/py-slepc4py/distinfo
index 7adaaaf5ea31..bfa906b09fb8 100644
--- a/math/py-slepc4py/distinfo
+++ b/math/py-slepc4py/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1694144485
-SHA256 (slepc4py-3.19.2.tar.gz) = da8b6a7aaaf5e4497b896b2e478c42dd9de4fb31da93eb294181bea3bb60c767
-SIZE (slepc4py-3.19.2.tar.gz) = 738463
+TIMESTAMP = 1699407536
+SHA256 (slepc4py-3.20.0.tar.gz) = 56cbea1f56746136e5a934bf4a481e566f35e475cb950c0a5bce7d5c3cc7690a
+SIZE (slepc4py-3.20.0.tar.gz) = 136037