diff --git a/devel/rubygem-rbs/Makefile b/devel/rubygem-rbs/Makefile
index c4ab483d85b9..6ea7258b676d 100644
--- a/devel/rubygem-rbs/Makefile
+++ b/devel/rubygem-rbs/Makefile
@@ -1,22 +1,23 @@
 PORTNAME=	rbs
-PORTVERSION=	3.10.4
+PORTVERSION=	4.0.2
 CATEGORIES=	devel rubygems
 MASTER_SITES=	RG
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Language for type signatures for Ruby and standard library definitions
 WWW=		https://github.com/ruby/rbs
 
 LICENSE=	BSD2CLAUSE RUBY
 LICENSE_COMB=	dual
 LICENSE_FILE_BSD2CLAUSE=${WRKSRC}/BSDL
 LICENSE_FILE_RUBY=	${WRKSRC}/COPYING
 
 RUN_DEPENDS=	rubygem-logger>=0:devel/rubygem-logger \
+		rubygem-prism>=1.6.0:textproc/rubygem-prism \
 		rubygem-tsort>=0:devel/rubygem-tsort
 
 USES=		gem
 
 PLIST_FILES=	bin/rbs
 
 .include <bsd.port.mk>
diff --git a/devel/rubygem-rbs/distinfo b/devel/rubygem-rbs/distinfo
index 2793a5c7b9f2..c590b17c1337 100644
--- a/devel/rubygem-rbs/distinfo
+++ b/devel/rubygem-rbs/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1775587802
-SHA256 (rubygem/rbs-3.10.4.gem) = b17d7c4be4bb31a11a3b529830f0aa206a807ca42f2e7921a3027dfc6b7e5ce8
-SIZE (rubygem/rbs-3.10.4.gem) = 1173504
+TIMESTAMP = 1776864280
+SHA256 (rubygem/rbs-4.0.2.gem) = af75671e66cd03434cc546622741ebf83f6197ec4328375805306330bf78ef25
+SIZE (rubygem/rbs-4.0.2.gem) = 1231872