Index: head/science/py-ase/Makefile
===================================================================
--- head/science/py-ase/Makefile	(revision 542943)
+++ head/science/py-ase/Makefile	(revision 542944)
@@ -1,26 +1,25 @@
 # $FreeBSD$
 
 PORTNAME=	ase
-DISTVERSION=	3.19.1
+DISTVERSION=	3.19.2
 CATEGORIES=	science python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Atomic simulation environment
 
 LICENSE=	LGPL21
 LICENSE_FILE=	${WRKSRC}/COPYING.LESSER
 
-RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}Flask>0:www/py-flask@${PY_FLAVOR} \
-		${PYTHON_PKGNAMEPREFIX}matplotlib>0:math/py-matplotlib@${PY_FLAVOR} \
+RUN_DEPENDS=	${PYNUMPY} \
 		${PYTHON_PKGNAMEPREFIX}scipy>0:science/py-scipy@${PY_FLAVOR} \
-		${PYNUMPY} \
 		nwchem:science/nwchem
+# optional dependencies: math/py-matplotlib, x11-toolkits/py-tkinter, www/py-flask (see https://wiki.fysik.dtu.dk/ase/install.html)
 
 USES=		python:3.5+
 USE_PYTHON=	distutils concurrent autoplist
 
 NO_ARCH=	yes
 
 .include <bsd.port.mk>
Index: head/science/py-ase/distinfo
===================================================================
--- head/science/py-ase/distinfo	(revision 542943)
+++ head/science/py-ase/distinfo	(revision 542944)
@@ -1,3 +1,3 @@
-TIMESTAMP = 1585985119
-SHA256 (ase-3.19.1.tar.gz) = 839029ed5ad9590b40c74773b9aef4733bfd9f8300cf998011584cad6ebdbf0f
-SIZE (ase-3.19.1.tar.gz) = 1852515
+TIMESTAMP = 1595527234
+SHA256 (ase-3.19.2.tar.gz) = 89446a3d194d90f0758f0c7248a5095a5a05a16f2a0f7d53db4d3103ca516e62
+SIZE (ase-3.19.2.tar.gz) = 1867198