diff --git a/www/rubygem-rdf/Makefile b/www/rubygem-rdf/Makefile
index 85db52669039c..62d08527e3690 100644
--- a/www/rubygem-rdf/Makefile
+++ b/www/rubygem-rdf/Makefile
@@ -1,7 +1,7 @@
 # Created by: TAKATSU Tomonari <tota@FreeBSD.org>
 
 PORTNAME=	rdf
-PORTVERSION=	3.1.14
+PORTVERSION=	3.1.15
 CATEGORIES=	www rubygems
 MASTER_SITES=	RG
 
diff --git a/www/rubygem-rdf/distinfo b/www/rubygem-rdf/distinfo
index dcacdb222bf81..dffb19bf0e994 100644
--- a/www/rubygem-rdf/distinfo
+++ b/www/rubygem-rdf/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1622213984
-SHA256 (rubygem/rdf-3.1.14.gem) = 40e3888567453fdac796776c44809d07785c24c350da54fbea50616b5f373020
-SIZE (rubygem/rdf-3.1.14.gem) = 152064
+TIMESTAMP = 1624189857
+SHA256 (rubygem/rdf-3.1.15.gem) = 94a91c27603398715379b5a38f48f93df360316db5e25c47f66a7843de7e0c2a
+SIZE (rubygem/rdf-3.1.15.gem) = 152064