diff --git a/science/mopac/Makefile b/science/mopac/Makefile
index 7b5c29c657f5..ceb04dd6224a 100644
--- a/science/mopac/Makefile
+++ b/science/mopac/Makefile
@@ -1,34 +1,36 @@
 PORTNAME=	mopac
 DISTVERSIONPREFIX=	v
-DISTVERSION=	23.0.3
-PORTREVISION=	1
+DISTVERSION=	23.1.0
 PORTEPOCH=	1
 CATEGORIES=	science # chemistry
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Semi-empirical (MNDO, etc.) molecular orbital calculation
-WWW=		http://openmopac.net/
+WWW=		http://openmopac.net \
+		https://github.com/openmopac/mopac
 
-LICENSE=	GPLv3
-LICENSE_FILE=	${WRKSRC}/COPYING
+LICENSE=	APACHE20
+LICENSE_FILE=	${WRKSRC}/LICENSE
 
 TEST_DEPENDS=	${PYNUMPY}
 
 USES=		blaslapack:openblas cmake:testing fortran python:test
 USE_LDCONFIG=	yes
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	openmopac
 
 CMAKE_OFF=	TESTS
 CMAKE_TESTING_ON=	TESTS # all tests pass
 CMAKE_ARGS=	-DPython3_EXECUTABLE=${PYTHON_CMD} #-DPython3_NumPy_INCLUDE_DIRS=${PYTHONPREFIX_SITELIBDIR}/numpy/core/include
 
 PLIST_FILES=	bin/mopac \
 		bin/mopac-makpol \
 		bin/mopac-param \
 		include/mopac.h \
 		lib/libmopac.so \
 		lib/libmopac.so.2
 
+# tests as of 23.1.0: 100% tests passed, 0 tests failed out of 125
+
 .include <bsd.port.mk>
diff --git a/science/mopac/distinfo b/science/mopac/distinfo
index 4fc03e7060d8..9d821c7e77b5 100644
--- a/science/mopac/distinfo
+++ b/science/mopac/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1733445667
-SHA256 (openmopac-mopac-v23.0.3_GH0.tar.gz) = d7a2e9dda36a6886ac8452eb8b30391295a017885e7ceac40dee496c4031e105
-SIZE (openmopac-mopac-v23.0.3_GH0.tar.gz) = 16983494
+TIMESTAMP = 1738905370
+SHA256 (openmopac-mopac-v23.1.0_GH0.tar.gz) = b4c3959c36706ae06601819c5e057a261f2265d196986dd0c38ab63990dd17cd
+SIZE (openmopac-mopac-v23.1.0_GH0.tar.gz) = 16970317