Index: head/math/exprtk/Makefile
===================================================================
--- head/math/exprtk/Makefile	(revision 559922)
+++ head/math/exprtk/Makefile	(revision 559923)
@@ -1,27 +1,27 @@
 # $FreeBSD$
 
 PORTNAME=	exprtk
-DISTVERSION=	g20201207 # upstream rolls backwards commit dates, so use the port update date here
+DISTVERSION=	g20210101
 CATEGORIES=	math
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	C++ mathematical expression library
 
 LICENSE=	MIT
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	ArashPartow
-GH_TAGNAME=	6dc74c3a6fcfc02feca9121b3cefdd43a8ed4e1e
+GH_TAGNAME=	fe9c77fc5ac9984ed9c75446b25eb96d890cdea0
 
 NO_BUILD=	yes
 NO_ARCH=	yes
 
 PLIST_FILES=	include/exprtk.hpp
 
 do-install:
 	${INSTALL_DATA} ${WRKSRC}/exprtk.hpp ${STAGEDIR}${PREFIX}/include
 
 benchmark:
 	cd ${WRKSRC} && ${MAKE_ENV} ${MAKE} ${MAKE_ARGS} pgo
 
 .include <bsd.port.mk>
Index: head/math/exprtk/distinfo
===================================================================
--- head/math/exprtk/distinfo	(revision 559922)
+++ head/math/exprtk/distinfo	(revision 559923)
@@ -1,3 +1,3 @@
-TIMESTAMP = 1609318416
-SHA256 (ArashPartow-exprtk-g20201207-6dc74c3a6fcfc02feca9121b3cefdd43a8ed4e1e_GH0.tar.gz) = e9e11ae6bfce5a05722b086d80428548b4d5016249eb4f2fad7cb166aef1f004
-SIZE (ArashPartow-exprtk-g20201207-6dc74c3a6fcfc02feca9121b3cefdd43a8ed4e1e_GH0.tar.gz) = 1321610
+TIMESTAMP = 1609586054
+SHA256 (ArashPartow-exprtk-g20210101-fe9c77fc5ac9984ed9c75446b25eb96d890cdea0_GH0.tar.gz) = b3e1a49db0c6e3ca9360ae03d80d8953fe7fab7f69a0af5e9bed1afe6113b2f5
+SIZE (ArashPartow-exprtk-g20210101-fe9c77fc5ac9984ed9c75446b25eb96d890cdea0_GH0.tar.gz) = 1321801