diff --git a/math/ambit/Makefile b/math/ambit/Makefile
index e6e7906e6414..1ed1f2c2a06b 100644
--- a/math/ambit/Makefile
+++ b/math/ambit/Makefile
@@ -1,30 +1,29 @@
 # $FreeBSD$
 
 PORTNAME=	ambit
 DISTVERSIONPREFIX=	v
-DISTVERSION=	0.3
-PORTREVISION=	3
+DISTVERSION=	0.4
 CATEGORIES=	math
 PKGNAMESUFFIX=	-tensor # avoid clash with shells/ambit
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	C++ library for tensor product calculations
 
 LICENSE=	GPLv3
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 LIB_DEPENDS=	libhdf5.so:science/hdf5 \
 		libomp.so:devel/openmp \
 		libopenblas.so:math/openblas \
 		libsz.so:science/szip
 
 USES=		cmake compiler:c++11-lang
 USE_GITHUB=	yes
 GH_ACCOUNT=	jturney
 
 # some declared cmake options do nothing: see https://github.com/jturney/ambit/issues/25 and the patch
 CMAKE_ARGS+=	-DSHARED_ONLY:BOOL=ON
 CMAKE_ARGS+=	-DENABLE_OPENMP:BOOL=ON
 CMAKE_ARGS+=	-DENABLE_TESTS:BOOL=OFF # https://github.com/jturney/ambit/issues/24
 
 .include <bsd.port.mk>
diff --git a/math/ambit/distinfo b/math/ambit/distinfo
index bf9b2912cbde..a0a3a49092cd 100644
--- a/math/ambit/distinfo
+++ b/math/ambit/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1556435749
-SHA256 (jturney-ambit-v0.3_GH0.tar.gz) = 6dbaa3ce6e21472e6f2294016cd97369f939a19581a890b22a9e77c18fbf1728
-SIZE (jturney-ambit-v0.3_GH0.tar.gz) = 335953
+TIMESTAMP = 1573371340
+SHA256 (jturney-ambit-v0.4_GH0.tar.gz) = e20c6fa9412b3d84bb01b16b2f5006d2b243283cede40ee9cebfb79b42b74094
+SIZE (jturney-ambit-v0.4_GH0.tar.gz) = 336134