diff --git a/security/rubygem-rbnacl4/Makefile b/security/rubygem-rbnacl4/Makefile
new file mode 100644
index 00000000000..15a3fafe856
--- /dev/null
+++ b/security/rubygem-rbnacl4/Makefile
@@ -0,0 +1,24 @@
+# $FreeBSD: head/security/rubygem-rbnacl/Makefile 458098 2018-01-05 00:50:27Z swills $
+
+PORTNAME=	rbnacl
+PORTVERSION=	4.0.2
+CATEGORIES=	security rubygems
+MASTER_SITES=	RG
+PKGNAMESUFFIX=	4
+
+MAINTAINER=	idefix@fechner.net
+COMMENT=	Networking and Cryptography (NaCl) library
+
+LICENSE=	MIT
+
+LIB_DEPENDS=	libsodium.so:security/libsodium
+BUILD_DEPENDS=	rubygem-bundler>=0:sysutils/rubygem-bundler
+RUN_DEPENDS=	rubygem-ffi>=0:devel/rubygem-ffi
+
+PORTSCOUT=	limit:^4\.
+
+NO_ARCH=	yes
+USES=		gem
+USE_RUBY=	yes
+
+.include <bsd.port.mk>
diff --git a/security/rubygem-rbnacl4/distinfo b/security/rubygem-rbnacl4/distinfo
new file mode 100644
index 00000000000..951ed6d7cc8
--- /dev/null
+++ b/security/rubygem-rbnacl4/distinfo
@@ -0,0 +1,3 @@
+TIMESTAMP = 1515155304
+SHA256 (rubygem/rbnacl-4.0.2.gem) = 885c5f5dfa23007132df6d34992067f867968fcef8071e371ca5378ef88bb321
+SIZE (rubygem/rbnacl-4.0.2.gem) = 220160
diff --git a/security/rubygem-rbnacl4/pkg-descr b/security/rubygem-rbnacl4/pkg-descr
new file mode 100644
index 00000000000..832bba49b35
--- /dev/null
+++ b/security/rubygem-rbnacl4/pkg-descr
@@ -0,0 +1,4 @@
+The Networking and Cryptography (NaCl) library provides a high-level toolkit for
+building cryptographic systems and protocols.
+
+WWW: https://github.com/cryptosphere/rbnacl