diff --git a/devel/py-fbprophet/Makefile b/devel/py-fbprophet/Makefile
index 2fc73cba4e1e..a61a3c9bfa40 100644
--- a/devel/py-fbprophet/Makefile
+++ b/devel/py-fbprophet/Makefile
@@ -1,30 +1,33 @@
 PORTNAME=	fbprophet
 PORTVERSION=	0.5
 PORTREVISION=	2
 CATEGORIES=	devel python
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	gmm@tutanota.com
 COMMENT=	Forecasting time series data based on an additive model
 WWW=		https://github.com/facebook/prophet
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
+DEPRECATED=	Depends on expired math/py-pystan
+EXPIRATION_DATE=2025-03-31
+
 USES=		compiler:c11 python
 USE_PYTHON=	autoplist distutils
 
 BUILD_DEPENDS+=	${PYTHON_PKGNAMEPREFIX}pystan>2.14:math/py-pystan@${PY_FLAVOR}
 
 RUN_DEPENDS+=	${PYTHON_PKGNAMEPREFIX}pystan>2.14:math/py-pystan@${PY_FLAVOR}
 RUN_DEPENDS+=	${PYTHON_PKGNAMEPREFIX}numpy>1.10.0:math/py-numpy@${PY_FLAVOR}
 RUN_DEPENDS+=	${PYTHON_PKGNAMEPREFIX}matplotlib>2.0.0:math/py-matplotlib@${PY_FLAVOR}
 RUN_DEPENDS+=	${PYTHON_PKGNAMEPREFIX}pandas>0.23.4:math/py-pandas@${PY_FLAVOR}
 RUN_DEPENDS+=	${PYTHON_PKGNAMEPREFIX}holidays>0.9.5:devel/py-holidays@${PY_FLAVOR}
 RUN_DEPENDS+=	${PYTHON_PKGNAMEPREFIX}lunardate>0.1.5:devel/py-lunardate@${PY_FLAVOR}
 RUN_DEPENDS+=	${PYTHON_PKGNAMEPREFIX}convertdate>2.1.2:devel/py-convertdate@${PY_FLAVOR}
 
 NO_ARCH=	yes
 
 .include <bsd.port.mk>