diff --git a/security/obfsclient/Makefile b/security/obfsclient/Makefile
index f57ab3bf1e0d..83170a32f0ea 100644
--- a/security/obfsclient/Makefile
+++ b/security/obfsclient/Makefile
@@ -1,44 +1,47 @@
 # Created by: Fabian Keil <fk@fabiankeil.de>
 
 PORTNAME=	obfsclient
 PORTVERSION=	0.0.2
 DISTVERSIONPREFIX=	v
 PORTREVISION=	11
 CATEGORIES=	security
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Tor-managed pluggable transport client
 
 LICENSE=	BSD2CLAUSE MIT ISCL BSD3CLAUSE
 LICENSE_COMB=	multi
 LICENSE_FILE=	${WRKSRC}/COPYING
 
+DEPRECATED=	https://github.com/Yawning/obfsclient/issues/37
+EXPIRATION_DATE=	2021-12-31
+
 LIB_DEPENDS=	liballium-1.0.so:devel/liballium \
 		libevent.so:devel/libevent
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	Yawning
 
 GNU_CONFIGURE=	yes
 USES=		autoreconf compiler:c++11-lib localbase pkgconfig ssl
 TEST_TARGET=	check
 
 PLIST_FILES=	bin/${PORTNAME}
 
 PORTDOCS=	COPYING
 
 OPTIONS_DEFINE=	DOCS
 
 .include <bsd.port.pre.mk>
 
 BROKEN=		fails to build
 .if ${SSL_DEFAULT} == base
 BROKEN_FreeBSD_12=	field has incomplete type 'HMAC_CTX' (aka 'hmac_ctx_st')
 BROKEN_FreeBSD_13=	field has incomplete type 'HMAC_CTX' (aka 'hmac_ctx_st')
 .endif
 
 post-install:
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	${INSTALL_DATA} ${WRKSRC}/COPYING ${STAGEDIR}${DOCSDIR}
 
 .include <bsd.port.post.mk>