diff --git a/math/exprtk/Makefile b/math/exprtk/Makefile
index 50f8c33a346e..70f45418c997 100644
--- a/math/exprtk/Makefile
+++ b/math/exprtk/Makefile
@@ -1,26 +1,25 @@
 PORTNAME=	exprtk
-DISTVERSION=	g20210303 # date when change was discovered because the upstream rolls back commit dates to Dec 31
+DISTVERSION=	0.0.1
 CATEGORIES=	math
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	C++ mathematical expression library
 WWW=		https://www.partow.net/programming/exprtk/index.html
 
 LICENSE=	MIT
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	ArashPartow
-GH_TAGNAME=	ca5c577917646ddba3f71ce6d5dd7d01f351ee80
 
 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>
diff --git a/math/exprtk/distinfo b/math/exprtk/distinfo
index a9233e405b3b..d7ea9979ed70 100644
--- a/math/exprtk/distinfo
+++ b/math/exprtk/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1614796076
-SHA256 (ArashPartow-exprtk-g20210303-ca5c577917646ddba3f71ce6d5dd7d01f351ee80_GH0.tar.gz) = 6cd88a01069e8a2b9bc67c75b8279170f57909dc2c0f788c27972601d41f85a1
-SIZE (ArashPartow-exprtk-g20210303-ca5c577917646ddba3f71ce6d5dd7d01f351ee80_GH0.tar.gz) = 1323558
+TIMESTAMP = 1665551516
+SHA256 (ArashPartow-exprtk-0.0.1_GH0.tar.gz) = fb72791c88ae3b3426e14fdad630027715682584daf56b973569718c56e33f28
+SIZE (ArashPartow-exprtk-0.0.1_GH0.tar.gz) = 1327483