diff --git a/science/ncrystal/Makefile b/science/ncrystal/Makefile
index fb63deb58062..9cfb8da272b6 100644
--- a/science/ncrystal/Makefile
+++ b/science/ncrystal/Makefile
@@ -1,29 +1,29 @@
 PORTNAME=	ncrystal
 DISTVERSIONPREFIX=	v
-DISTVERSION=	4.2.0
+DISTVERSION=	4.2.6
 CATEGORIES=	science # physics
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Library for thermal neutron transport in crystals and other materials
 WWW=		https://github.com/mctools/ncrystal
 
 LICENSE=	APACHE20
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 USES=		cmake:testing python:build shebangfix
 USE_LDCONFIG=	yes
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	mctools
 
 SHEBANG_FILES=	tests/scripts/*
 
 CMAKE_TESTING_ON=	NCRYSTAL_ENABLE_TESTING \
 			NCRYSTAL_ENABLE_CORE_TEST
 
 post-install: # workaround for https://github.com/mctools/ncrystal/issues/150
 	@${RM} ${STAGEDIR}${PREFIX}/*.sh
 
-# tests as of 4.1.4: 54% tests passed, 37 tests failed out of 80, see https://github.com/mctools/ncrystal/issues/231
+# tests as of 4.2.6: 52% tests passed, 42 tests failed out of 87
 
 .include <bsd.port.mk>
diff --git a/science/ncrystal/distinfo b/science/ncrystal/distinfo
index a9c11355be17..1a8eec6572c9 100644
--- a/science/ncrystal/distinfo
+++ b/science/ncrystal/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1749700880
-SHA256 (mctools-ncrystal-v4.2.0_GH0.tar.gz) = bc01465f4e7db596ebba34df96ad744eea7cd1d2308fb2ff1ae532d0dbc50725
-SIZE (mctools-ncrystal-v4.2.0_GH0.tar.gz) = 2812384
+TIMESTAMP = 1753507988
+SHA256 (mctools-ncrystal-v4.2.6_GH0.tar.gz) = 4e7926d8bb931cce3546e9406a2a3d9b182b864e94ce34e31b1a6d9475479602
+SIZE (mctools-ncrystal-v4.2.6_GH0.tar.gz) = 2821990
diff --git a/science/py-ncrystal/Makefile b/science/py-ncrystal/Makefile
index 16b71cb75d5e..ed1e1279b00e 100644
--- a/science/py-ncrystal/Makefile
+++ b/science/py-ncrystal/Makefile
@@ -1,39 +1,39 @@
 PORTNAME=	ncrystal
 DISTVERSIONPREFIX=	v
-DISTVERSION=	4.2.0
+DISTVERSION=	4.2.6
 CATEGORIES=	science # physics
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Library for thermal neutron transport in crystals and other materials
 WWW=		https://mctools.github.io/ncrystal/
 
 LICENSE=	APACHE20
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BUILD_DEPENDS=	${PY_SETUPTOOLS} \
 		${PYNUMPY} \
 		${PYTHON_PKGNAMEPREFIX}scikit-build-core>0:devel/py-scikit-build-core@${PY_FLAVOR} \
 		cmake:devel/cmake-core
 RUN_DEPENDS=	${PYNUMPY}
 
 USES=		python
 USE_PYTHON=	pep517 concurrent autoplist
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	mctools
 
 TEST_ENV=	${MAKE_ENV} \
 		PYTHONPATH=${STAGEDIR}${PYTHONPREFIX_SITELIBDIR} \
 		PATH=${STAGEDIR}${PREFIX}/bin:${PATH}
 #TEST_WRKSRC=	${WRKSRC}/ncrystal_python
 
 post-install:
 	# strip binary
 	#@${STRIP_CMD} ${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}/NCrystal/ncrystal_pyinst_data/lib/libNCrystal.so
 
-do-test: # the third test fails for an unknown reason
+do-test:
 	@cd ${TEST_WRKSRC} && \
 		${SETENV} ${TEST_ENV} ${PYTHON_CMD} -m NCrystal.test all
 
 .include <bsd.port.mk>
diff --git a/science/py-ncrystal/distinfo b/science/py-ncrystal/distinfo
index a23e154ff514..aca64d45e427 100644
--- a/science/py-ncrystal/distinfo
+++ b/science/py-ncrystal/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1749705869
-SHA256 (mctools-ncrystal-v4.2.0_GH0.tar.gz) = bc01465f4e7db596ebba34df96ad744eea7cd1d2308fb2ff1ae532d0dbc50725
-SIZE (mctools-ncrystal-v4.2.0_GH0.tar.gz) = 2812384
+TIMESTAMP = 1753507607
+SHA256 (mctools-ncrystal-v4.2.6_GH0.tar.gz) = 4e7926d8bb931cce3546e9406a2a3d9b182b864e94ce34e31b1a6d9475479602
+SIZE (mctools-ncrystal-v4.2.6_GH0.tar.gz) = 2821990