diff --git a/graphics/quat-gui/Makefile b/graphics/quat-gui/Makefile
index d70378e28e9b..38e5ed31b5a2 100644
--- a/graphics/quat-gui/Makefile
+++ b/graphics/quat-gui/Makefile
@@ -1,6 +1,6 @@
 PORTNAME=	quat
-PORTVERSION=	1.20
-PORTREVISION=	17
+DISTVERSION=	1.20
+PORTREVISION=	18
 CATEGORIES=	graphics
 MASTER_SITES=	https://www.physcip.uni-stuttgart.de/pages/~phy11733/download/
 PKGNAMESUFFIX=	-gui
@@ -11,6 +11,9 @@ WWW=		https://www.physcip.uni-stuttgart.de/pages/~phy11733/index_e.html
 
 LICENSE=	GPLv2+
 
+DEPRECATED=	Last upstream release was in 2003
+EXPIRATION_DATE=	2025-05-05
+
 LIB_DEPENDS=	libfltk.so:x11-toolkits/fltk
 
 USES=		gl localbase:ldflags xorg