diff --git a/www/rubygem-rdf/Makefile b/www/rubygem-rdf/Makefile
index 77fad31e2cfc..afee37bf2c73 100644
--- a/www/rubygem-rdf/Makefile
+++ b/www/rubygem-rdf/Makefile
@@ -1,27 +1,28 @@
 PORTNAME=	rdf
 PORTVERSION=	3.3.4
+PORTREVISION=	1
 CATEGORIES=	www rubygems
 MASTER_SITES=	RG
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Pure-Ruby library for working with RDF data
 WWW=		https://ruby-rdf.github.io/rdf/ \
 		https://github.com/ruby-rdf/rdf
 
 LICENSE=	UNLICENSE
 LICENSE_FILE=	${WRKSRC}/UNLICENSE
 
 RUN_DEPENDS=	rubygem-bcp47_spec>=0.2<1:devel/rubygem-bcp47_spec \
-		rubygem-bigdecimal>=3.1.5<4:math/rubygem-bigdecimal \
+		rubygem-bigdecimal>=3.1.5<5:math/rubygem-bigdecimal \
 		rubygem-link_header>=0.0.8<1:www/rubygem-link_header \
 		rubygem-logger>=1.5<2:devel/rubygem-logger \
 		rubygem-ostruct>=0.6<1:devel/rubygem-ostruct \
 		rubygem-readline>=0.0<1:devel/rubygem-readline
 
 USES=		gem
 
 NO_ARCH=	yes
 
 PLIST_FILES=	bin/rdf
 
 .include <bsd.port.mk>
diff --git a/www/rubygem-rdf/files/patch-gemspec b/www/rubygem-rdf/files/patch-gemspec
new file mode 100644
index 000000000000..13f3820a04ad
--- /dev/null
+++ b/www/rubygem-rdf/files/patch-gemspec
@@ -0,0 +1,11 @@
+--- rdf.gemspec.orig	2025-12-29 04:17:38 UTC
++++ rdf.gemspec
+@@ -23,7 +23,7 @@ Gem::Specification.new do |s|
+   s.specification_version = 4
+ 
+   s.add_runtime_dependency(%q<bcp47_spec>.freeze, ["~> 0.2".freeze])
+-  s.add_runtime_dependency(%q<bigdecimal>.freeze, ["~> 3.1".freeze, ">= 3.1.5".freeze])
++  s.add_runtime_dependency(%q<bigdecimal>.freeze, [">= 3.1.5".freeze, "< 5".freeze])
+   s.add_runtime_dependency(%q<link_header>.freeze, ["~> 0.0".freeze, ">= 0.0.8".freeze])
+   s.add_runtime_dependency(%q<logger>.freeze, ["~> 1.5".freeze])
+   s.add_runtime_dependency(%q<ostruct>.freeze, ["~> 0.6".freeze])