diff --git a/devel/rubygem-oj/Makefile b/devel/rubygem-oj/Makefile
index ab1f7f11172c..a7d1b538a5ca 100644
--- a/devel/rubygem-oj/Makefile
+++ b/devel/rubygem-oj/Makefile
@@ -1,23 +1,24 @@
 PORTNAME=	oj
-PORTVERSION=	3.16.4
+PORTVERSION=	3.16.5
 CATEGORIES=	devel rubygems
 MASTER_SITES=	RG
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Fast JSON parser and serializer
 WWW=		https://www.ohler.com/oj/
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
-RUN_DEPENDS=	rubygem-bigdecimal>=3.0:math/rubygem-bigdecimal
+RUN_DEPENDS=	rubygem-bigdecimal>=3.0:math/rubygem-bigdecimal \
+		rubygem-ostruct>=0.2:devel/rubygem-ostruct
 
 USES=		gem
 
 # TODO: find a better way to do this
 # Install all header files, some of them are required by devel/rubygem-oj-introspect
 post-install:
 	${MKDIR} ${STAGEDIR}${PREFIX}/${GEM_LIB_DIR}/ext/oj
 	${INSTALL_DATA} ${WRKSRC}/ext/oj/*.h ${STAGEDIR}${PREFIX}/${GEM_LIB_DIR}/ext/oj/
 
 .include <bsd.port.mk>
diff --git a/devel/rubygem-oj/distinfo b/devel/rubygem-oj/distinfo
index edd0cd30ce0f..2d5015ec4ba5 100644
--- a/devel/rubygem-oj/distinfo
+++ b/devel/rubygem-oj/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1718580258
-SHA256 (rubygem/oj-3.16.4.gem) = 208119c663e58a81e2c395d4592d06b66cef2ea1401eef1d1de210ce6a56562c
-SIZE (rubygem/oj-3.16.4.gem) = 261632
+TIMESTAMP = 1724084770
+SHA256 (rubygem/oj-3.16.5.gem) = 1e74311cd86a21437703762eb3757ecbe3808058164ff2259ec2367e21f8067c
+SIZE (rubygem/oj-3.16.5.gem) = 262144