diff --git a/science/py-dwave-preprocessing/Makefile b/science/py-dwave-preprocessing/Makefile
index 6c9da8420ea7..d146d70e12b4 100644
--- a/science/py-dwave-preprocessing/Makefile
+++ b/science/py-dwave-preprocessing/Makefile
@@ -1,39 +1,38 @@
 PORTNAME=	dwave-preprocessing
-DISTVERSION=	0.4.0
-PORTREVISION=	1
+DISTVERSION=	0.5.2
 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=	${PYTHON_PKGNAMEPREFIX}dimod>0:science/py-dimod@${PY_FLAVOR} \
 		${PYNUMPY}
 BUILD_DEPENDS=	${PY_DEPENDS} \
 		${PYTHON_PKGNAMEPREFIX}wheel>=0.30.0:devel/py-wheel@${PY_FLAVOR}
 RUN_DEPENDS=	${PY_DEPENDS}
-xTEST_DEPENDS=	${PYTHON_PKGNAMEPREFIX}dwave-system>0:science/dwave-system@${PY_FLAVOR} \
-		${PYTHON_PKGNAMEPREFIX}parameterized>0:devel/py-parameterized@${PY_FLAVOR}
 
 USES=		python:3.7+
-USE_PYTHON=	distutils cython unittest # 3 tests fail, see https://github.com/dwavesystems/dwave-preprocessing/issues/44
+USE_PYTHON=	distutils cython unittest
 
 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${PYTHON_EXT_SUFFIX}.so
+	@${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 a83055cb266e..9a51e1da7352 100644
--- a/science/py-dwave-preprocessing/distinfo
+++ b/science/py-dwave-preprocessing/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1660494073
-SHA256 (dwavesystems-dwave-preprocessing-0.4.0_GH0.tar.gz) = 04ff8937b131af3520d4197f256c4ba68cad0783af131c57ce20083d3f36fad3
-SIZE (dwavesystems-dwave-preprocessing-0.4.0_GH0.tar.gz) = 80577
+TIMESTAMP = 1668294419
+SHA256 (dwavesystems-dwave-preprocessing-0.5.2_GH0.tar.gz) = 07f80f4e8ede2f22d65a94711ca98fc41ce76c2825a917b0f70b8c6eeb569db7
+SIZE (dwavesystems-dwave-preprocessing-0.5.2_GH0.tar.gz) = 101675
diff --git a/science/py-dwave-preprocessing/pkg-plist b/science/py-dwave-preprocessing/pkg-plist
index 56e6253a73d6..e869dca5837e 100644
--- a/science/py-dwave-preprocessing/pkg-plist
+++ b/science/py-dwave-preprocessing/pkg-plist
@@ -1,34 +1,47 @@
 %%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/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__/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/pypresolve.py