diff --git a/science/py-dwave-preprocessing/Makefile b/science/py-dwave-preprocessing/Makefile
index c4d24ad56308..15a21bb2d944 100644
--- a/science/py-dwave-preprocessing/Makefile
+++ b/science/py-dwave-preprocessing/Makefile
@@ -1,40 +1,39 @@
 PORTNAME=	dwave-preprocessing
-DISTVERSION=	0.5.4
-PORTREVISION=	1
+DISTVERSION=	0.6.0
 CATEGORIES=	science python # quantum-computing
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	DWave: Preprocessing tools to aid in solving binary quadratic models
 WWW=		https://github.com/dwavesystems/dwave-preprocessing
 
 LICENSE=	APACHE20
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 PY_DEPENDS=	${PYTHON_PKGNAMEPREFIX}dimod>=0.12.2:science/py-dimod@${PY_FLAVOR} \
 		${PYNUMPY}
 BUILD_DEPENDS=	${PY_DEPENDS} \
 		${PYTHON_PKGNAMEPREFIX}wheel>=0.30.0:devel/py-wheel@${PY_FLAVOR}
 LIB_DEPENDS=	libspdlog.so:devel/spdlog
 RUN_DEPENDS=	${PY_DEPENDS}
 
 USES=		localbase:ldflags python
 USE_PYTHON=	distutils cython unittest # 1 test fails, see https://github.com/dwavesystems/dwave-preprocessing/issues/74
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	dwavesystems
 
 TEST_ENV=	${MAKE_ENV} PYTHONPATH=${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}
 TEST_WRKSRC=	${WRKSRC}/tests
 
 post-install:
 	# strip binaries
 	@${STRIP_CMD} \
 		${STAGEDIR}${PYTHON_SITELIBDIR}/dwave/preprocessing/cyfix_variables${PYTHON_EXT_SUFFIX}.so \
 		${STAGEDIR}${PYTHON_SITELIBDIR}/dwave/preprocessing/presolve/cypresolve${PYTHON_EXT_SUFFIX}.so
 	# remove conflicting __init__.py, see https://github.com/dwavesystems/dwave-preprocessing/issues/45
 	@${RM} -r \
 		${STAGEDIR}${PYTHON_SITELIBDIR}/dwave/__init__.py \
 		${STAGEDIR}${PYTHON_SITELIBDIR}/dwave/__pycache__
 
 .include <bsd.port.mk>
diff --git a/science/py-dwave-preprocessing/distinfo b/science/py-dwave-preprocessing/distinfo
index 00656393515d..5301902eeec9 100644
--- a/science/py-dwave-preprocessing/distinfo
+++ b/science/py-dwave-preprocessing/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1671954380
-SHA256 (dwavesystems-dwave-preprocessing-0.5.4_GH0.tar.gz) = 864ec18a8f14a83f0439d3cb6a9006c0d9577012f2cab14b622dc715bac17b24
-SIZE (dwavesystems-dwave-preprocessing-0.5.4_GH0.tar.gz) = 104138
+TIMESTAMP = 1688052867
+SHA256 (dwavesystems-dwave-preprocessing-0.6.0_GH0.tar.gz) = 6b7b78c20a3a4dc09a773824571f1001152451bc3e11c2204423949b45360e94
+SIZE (dwavesystems-dwave-preprocessing-0.6.0_GH0.tar.gz) = 123008
diff --git a/science/py-dwave-preprocessing/files/patch-setup.py b/science/py-dwave-preprocessing/files/patch-setup.py
index eb472512857e..3502e3ac7a03 100644
--- a/science/py-dwave-preprocessing/files/patch-setup.py
+++ b/science/py-dwave-preprocessing/files/patch-setup.py
@@ -1,10 +1,10 @@
---- setup.py.orig	2022-12-25 07:50:44 UTC
+--- setup.py.orig	2023-06-29 15:35:53 UTC
 +++ setup.py
-@@ -26,6 +26,7 @@ extra_compile_args = {
-     'msvc': ['/std:c++17', '/EHsc'],
-     'unix': [
-         '-std=c++17', 
-+        '-DSPDLOG_FMT_EXTERNAL=1', 
-        ],
- }
- 
+@@ -63,7 +63,6 @@ setup(
+     include_dirs=[
+         numpy.get_include(),
+         dimod.get_include(),
+-        'extern/spdlog/include/',
+         ],
+     install_requires=[
+         'numpy>=1.17.3,<2.0.0',  # this is the oldest supported NumPy on Python 3.8
diff --git a/science/py-dwave-preprocessing/pkg-plist b/science/py-dwave-preprocessing/pkg-plist
index e869dca5837e..93a7865b4dcf 100644
--- a/science/py-dwave-preprocessing/pkg-plist
+++ b/science/py-dwave-preprocessing/pkg-plist
@@ -1,47 +1,55 @@
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/__init__.py
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/__pycache__/__init__%%PYTHON_EXT_SUFFIX%%.opt-1.pyc
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/__pycache__/__init__%%PYTHON_EXT_SUFFIX%%.pyc
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/__pycache__/lower_bounds%%PYTHON_EXT_SUFFIX%%.opt-1.pyc
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/__pycache__/lower_bounds%%PYTHON_EXT_SUFFIX%%.pyc
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/composites/__init__.py
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/composites/__pycache__/__init__%%PYTHON_EXT_SUFFIX%%.opt-1.pyc
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/composites/__pycache__/__init__%%PYTHON_EXT_SUFFIX%%.pyc
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/composites/__pycache__/clip%%PYTHON_EXT_SUFFIX%%.opt-1.pyc
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/composites/__pycache__/clip%%PYTHON_EXT_SUFFIX%%.pyc
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/composites/__pycache__/connected_components%%PYTHON_EXT_SUFFIX%%.opt-1.pyc
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/composites/__pycache__/connected_components%%PYTHON_EXT_SUFFIX%%.pyc
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/composites/__pycache__/fix_variables%%PYTHON_EXT_SUFFIX%%.opt-1.pyc
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/composites/__pycache__/fix_variables%%PYTHON_EXT_SUFFIX%%.pyc
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/composites/__pycache__/scale%%PYTHON_EXT_SUFFIX%%.opt-1.pyc
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/composites/__pycache__/scale%%PYTHON_EXT_SUFFIX%%.pyc
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/composites/__pycache__/spin_reversal_transform%%PYTHON_EXT_SUFFIX%%.opt-1.pyc
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/composites/__pycache__/spin_reversal_transform%%PYTHON_EXT_SUFFIX%%.pyc
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/composites/clip.py
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/composites/connected_components.py
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/composites/fix_variables.py
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/composites/scale.py
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/composites/spin_reversal_transform.py
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/cyfix_variables.cpp
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/cyfix_variables%%PYTHON_EXT_SUFFIX%%.so
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/cyfix_variables.pyx
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/include/dwave-preprocessing/fix_variables.hpp
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/include/dwave-preprocessing/helper_data_structures.hpp
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/include/dwave-preprocessing/helper_graph_algorithms.hpp
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/include/dwave-preprocessing/implication_network.hpp
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/include/dwave-preprocessing/mapping_policy.hpp
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/include/dwave-preprocessing/posiform_info.hpp
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/include/dwave-preprocessing/push_relabel.hpp
-%%PYTHON_SITELIBDIR%%/dwave/preprocessing/include/dwave/presolve.h
+%%PYTHON_SITELIBDIR%%/dwave/preprocessing/include/dwave/exceptions.hpp
+%%PYTHON_SITELIBDIR%%/dwave/preprocessing/include/dwave/flags.hpp
+%%PYTHON_SITELIBDIR%%/dwave/preprocessing/include/dwave/presolve.hpp
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/libcpp.pxd
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/lower_bounds.py
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/presolve/__init__.pxd
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/presolve/__init__.py
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/presolve/__pycache__/__init__%%PYTHON_EXT_SUFFIX%%.opt-1.pyc
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/presolve/__pycache__/__init__%%PYTHON_EXT_SUFFIX%%.pyc
+%%PYTHON_SITELIBDIR%%/dwave/preprocessing/presolve/__pycache__/exceptions%%PYTHON_EXT_SUFFIX%%.opt-1.pyc
+%%PYTHON_SITELIBDIR%%/dwave/preprocessing/presolve/__pycache__/exceptions%%PYTHON_EXT_SUFFIX%%.pyc
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/presolve/__pycache__/pypresolve%%PYTHON_EXT_SUFFIX%%.opt-1.pyc
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/presolve/__pycache__/pypresolve%%PYTHON_EXT_SUFFIX%%.pyc
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/presolve/cypresolve.cpp
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/presolve/cypresolve%%PYTHON_EXT_SUFFIX%%.so
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/presolve/cypresolve.pxd
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/presolve/cypresolve.pyx
+%%PYTHON_SITELIBDIR%%/dwave/preprocessing/presolve/exceptions.py
 %%PYTHON_SITELIBDIR%%/dwave/preprocessing/presolve/pypresolve.py
+%%PYTHON_SITELIBDIR%%/dwave/preprocessing/src/exceptions.cpp
+%%PYTHON_SITELIBDIR%%/dwave/preprocessing/src/presolve.cpp
+%%PYTHON_SITELIBDIR%%/dwave/preprocessing/src/presolveimpl.hpp