diff --git a/science/R-cran-udunits2/Makefile b/science/R-cran-udunits2/Makefile
index 2ddab39c897d..27e22d1c8288 100644
--- a/science/R-cran-udunits2/Makefile
+++ b/science/R-cran-udunits2/Makefile
@@ -1,19 +1,18 @@
 # Created by: TAKATSU Tomonari <tota@FreeBSD.org>
 
 PORTNAME=	udunits2
-PORTVERSION=	0.13
-PORTREVISION=	4
+PORTVERSION=	0.13.1
 CATEGORIES=	science
 DISTNAME=	${PORTNAME}_${DISTVERSION}
 
 MAINTAINER=	tota@FreeBSD.org
 COMMENT=	Udunits-2 Bindings for R
 
 LICENSE=	GPLv2
 
 LIB_DEPENDS=	libudunits2.so:science/udunits \
 		libexpat.so:textproc/expat2
 
 USES=		cran:auto-plist,compiles
 
 .include <bsd.port.mk>
diff --git a/science/R-cran-udunits2/distinfo b/science/R-cran-udunits2/distinfo
index 18ee51b1c636..7e681cfc8e13 100644
--- a/science/R-cran-udunits2/distinfo
+++ b/science/R-cran-udunits2/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1498444694
-SHA256 (udunits2_0.13.tar.gz) = d155d3c07f6202b65dec4075ffd1e1c3f4f35f5fdece8cfb319d39256a3e5b79
-SIZE (udunits2_0.13.tar.gz) = 67182
+TIMESTAMP = 1636200159
+SHA256 (udunits2_0.13.1.tar.gz) = 1c2144d16ce8ee9b1f11d6fa9235460f69689a30941aed3a530a231f914b08d1
+SIZE (udunits2_0.13.1.tar.gz) = 67714