diff --git a/misc/quantum++/Makefile b/misc/quantum++/Makefile
index fd5532163bff..869c29585f86 100644
--- a/misc/quantum++/Makefile
+++ b/misc/quantum++/Makefile
@@ -1,29 +1,28 @@
 PORTNAME=	quantum++
 DISTVERSIONPREFIX=	v
-DISTVERSION=	4.0.1
-PORTREVISION=	1
+DISTVERSION=	4.2
 CATEGORIES=	misc devel
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	C++ header-only general purpose quantum computing library
 WWW=		https://github.com/softwareQinc/qpp
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 USES=		cmake:testing compiler:c++17-lang eigen:3,build,run
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	softwareQinc
 GH_PROJECT=	qpp
 
 CMAKE_TESTING_ON=	WITH_UNIT_TESTS
 CMAKE_TESTING_TARGET=	unit_tests
 
 NO_BUILD=	yes
 NO_ARCH=	yes
 
 post-test: # run tests
 	@${BUILD_WRKSRC}/unit_tests/unit_tests
 
 .include <bsd.port.mk>
diff --git a/misc/quantum++/distinfo b/misc/quantum++/distinfo
index ca9d7a89d2e6..05101eca7a4e 100644
--- a/misc/quantum++/distinfo
+++ b/misc/quantum++/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1680600622
-SHA256 (softwareQinc-qpp-v4.0.1_GH0.tar.gz) = cb49e7fa8280dc8713d404f612b3506d40c89734a7deb1ede9701ba7c6b8bce1
-SIZE (softwareQinc-qpp-v4.0.1_GH0.tar.gz) = 5703724
+TIMESTAMP = 1685067906
+SHA256 (softwareQinc-qpp-v4.2_GH0.tar.gz) = c466a1af0f7a8be82dbc8917a669bf9cef7aa88069b80f85dc0c233ef9fd6d56
+SIZE (softwareQinc-qpp-v4.2_GH0.tar.gz) = 5709728