diff --git a/textproc/Makefile b/textproc/Makefile
index 34f333a3cc93..6e3b5138034b 100644
--- a/textproc/Makefile
+++ b/textproc/Makefile
@@ -1610,6 +1610,7 @@
     SUBDIR += rubygem-loofah
     SUBDIR += rubygem-ltsv
     SUBDIR += rubygem-markaby
+    SUBDIR += rubygem-mdl
     SUBDIR += rubygem-minima
     SUBDIR += rubygem-multi_xml
     SUBDIR += rubygem-nokogiri
diff --git a/textproc/rubygem-mdl/Makefile b/textproc/rubygem-mdl/Makefile
new file mode 100644
index 000000000000..12023c4c5fac
--- /dev/null
+++ b/textproc/rubygem-mdl/Makefile
@@ -0,0 +1,26 @@
+# $FreeBSD$
+
+PORTNAME=	mdl
+PORTVERSION=	0.11.0
+CATEGORIES=	textproc rubygems
+MASTER_SITES=	RG
+
+MAINTAINER=	vvelox@vvelox.net
+COMMENT=	Check markdown files and flag style issues
+
+LICENSE=	MIT
+
+RUN_DEPENDS=	rubygem-kramdown>=2.3<3:textproc/rubygem-kramdown \
+		rubygem-kramdown-parser-gfm>=1.1<2:textproc/rubygem-kramdown-parser-gfm \
+		rubygem-mixlib-cli>=2.1.1<3:devel/rubygem-mixlib-cli \
+		rubygem-mixlib-config>=2.2.1<4:devel/rubygem-mixlib-config \
+		rubygem-mixlib-shellout>=0:devel/rubygem-mixlib-shellout
+
+USES=		gem
+USE_RUBY=	yes
+
+NO_ARCH=	yes
+
+PLIST_FILES=	bin/mdl
+
+.include <bsd.port.mk>
diff --git a/textproc/rubygem-mdl/distinfo b/textproc/rubygem-mdl/distinfo
new file mode 100644
index 000000000000..032d37a8a4ae
--- /dev/null
+++ b/textproc/rubygem-mdl/distinfo
@@ -0,0 +1,3 @@
+TIMESTAMP = 1608383815
+SHA256 (rubygem/mdl-0.11.0.gem) = 18d3dbf9d9dfa128de541166c63879d04256f1f539a35e19b1a8312db6c1ff6d
+SIZE (rubygem/mdl-0.11.0.gem) = 17920
diff --git a/textproc/rubygem-mdl/pkg-descr b/textproc/rubygem-mdl/pkg-descr
new file mode 100644
index 000000000000..5b8342977f9e
--- /dev/null
+++ b/textproc/rubygem-mdl/pkg-descr
@@ -0,0 +1,3 @@
+A tool to check markdown files and flag style issues.
+
+WWW: https://github.com/markdownlint/markdownlint