diff --git a/math/cimod/Makefile b/math/cimod/Makefile
index 5e299e088178..4b412a2bc791 100644
--- a/math/cimod/Makefile
+++ b/math/cimod/Makefile
@@ -1,31 +1,31 @@
 PORTNAME=	cimod
 DISTVERSIONPREFIX=	v
-DISTVERSION=	1.4.50
+DISTVERSION=	1.4.51
 CATEGORIES=	math
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	C++ header-only library for a binary quadratic models
 WWW=		https://github.com/OpenJij/cimod
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BUILD_DEPENDS=	nlohmann-json>0:devel/nlohmann-json
 RUN_DEPENDS=	nlohmann-json>0:devel/nlohmann-json
 TEST_DEPENDS=	googletest>0:devel/googletest
 
 USES=		cmake:testing compiler:c++17-lang eigen:3,build,run
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	OpenJij
 
 CMAKE_ON=	CIMOD_INSTALL # doesn't do anything, see https://github.com/OpenJij/cimod/issues/103
 CMAKE_OFF=	CIMOD_TEST CIMOD_DOCS
 CMAKE_TESTING_ON=	CIMOD_TEST
 
 NO_ARCH=	yes
 
 do-install: # see https://github.com/OpenJij/cimod/issues/103
 	cd ${WRKSRC}/include && ${COPYTREE_SHARE} ${PORTNAME} ${STAGEDIR}${PREFIX}/include
 
 .include <bsd.port.mk>
diff --git a/math/cimod/distinfo b/math/cimod/distinfo
index a487f2052714..d6c9f6d3c0b7 100644
--- a/math/cimod/distinfo
+++ b/math/cimod/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1674533701
-SHA256 (OpenJij-cimod-v1.4.50_GH0.tar.gz) = 6832d2de39e58dd4225127b102753c3c949655ce4f7b5390a4d17f712b588ac7
-SIZE (OpenJij-cimod-v1.4.50_GH0.tar.gz) = 139811
+TIMESTAMP = 1674797380
+SHA256 (OpenJij-cimod-v1.4.51_GH0.tar.gz) = ffd8dd8eb4c565a85282a81c2035f95fc6214d915f40bc63f3c918848537fdf6
+SIZE (OpenJij-cimod-v1.4.51_GH0.tar.gz) = 139823