diff --git a/math/Imath/Makefile b/math/Imath/Makefile
index 98d16af3bfbc..b4348fd7bd11 100644
--- a/math/Imath/Makefile
+++ b/math/Imath/Makefile
@@ -1,58 +1,58 @@
 # Based on the graphics/ilmbase port that was done by: nork@FreeBSD.org
 
 PORTNAME=	Imath
-PORTVERSION=	3.1.2
+PORTVERSION=	3.1.3
 CATEGORIES=	math devel graphics
 
 MAINTAINER=	mandree@FreeBSD.org
 COMMENT=	C++/Python lib of 2D/3D vector, matrix, math ops for computer graphics
 
 LICENSE=	BSD3CLAUSE
 
 USES=		cmake compiler:c++14-lang pkgconfig
 
 USE_GITHUB=	yes
 GH_TUPLE=	AcademySoftwareFoundation:Imath:v${PORTVERSION}
 USE_LDCONFIG=	yes
 
 CMAKE_ARGS+=	-DCMAKE_DEBUG_POSTFIX= \
 		-DCMAKE_INSTALL_PREFIX=${PREFIX}
 
 PATCH_STRIP=	-p1
 
 PLIST_SUB=	MAJORVER=${_MAJORVER} \
 		MINVER=${_MINVER} \
 		PLVER=${_PLVER} \
 		VER=${_VER} \
 		PYVER=${PYTHON_VER:S/./_/}
 PORTDOCS=	README.md
 
 OPTIONS_DEFINE=	DOCS LARGE_STACK PYTHON
 OPTIONS_SUB=	yes
 
 LARGE_STACK_DESC=	Enable sys-dependent large stack optimizations
 LARGE_STACK_CMAKE_BOOL=	IMATH_ENABLE_LARGE_STACK
 
 PYTHON_BUILD_DEPENDS=	${PYNUMPY}
 PYTHON_LIB_DEPENDS=	${PY_BOOST}
 PYTHON_RUN_DEPENDS=	${PYNUMPY}
 PYTHON_USES=		python
 PYTHON_CMAKE_BOOL=	PYTHON
 
 _MAJORVER=	3_1
 _VER=		29
-_MINVER=	1
+_MINVER=	2
 _PLVER=		0
 
 post-install:
 .for l in libImath
 	${STRIP_CMD} ${STAGEDIR}${PREFIX}/lib/${l}-${_MAJORVER}.so
 .endfor
 
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	${INSTALL_DATA} ${PORTDOCS:S|^|${WRKSRC}/|} ${STAGEDIR}${DOCSDIR}
 
 do-test:
 	cd ${BUILD_WRKSRC} && ctest -j ${MAKE_JOBS_NUMBER}
 
 .include <bsd.port.mk>
diff --git a/math/Imath/distinfo b/math/Imath/distinfo
index b41de61411f6..722b31a5a388 100644
--- a/math/Imath/distinfo
+++ b/math/Imath/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1627939826
-SHA256 (AcademySoftwareFoundation-Imath-3.1.2-v3.1.2_GH0.tar.gz) = f21350efdcc763e23bffd4ded9bbf822e630c15ece6b0697e2fcb42737c08c2d
-SIZE (AcademySoftwareFoundation-Imath-3.1.2-v3.1.2_GH0.tar.gz) = 566098
+TIMESTAMP = 1630628925
+SHA256 (AcademySoftwareFoundation-Imath-3.1.3-v3.1.3_GH0.tar.gz) = 0bf7ec51162c4d17a4c5b850fb3f6f7a195cff9fa71f4da7735f74d7b5124320
+SIZE (AcademySoftwareFoundation-Imath-3.1.3-v3.1.3_GH0.tar.gz) = 570840