diff --git a/math/R-cran-gmp/Makefile b/math/R-cran-gmp/Makefile
index 9ef68380c668..dda9fd29fadb 100644
--- a/math/R-cran-gmp/Makefile
+++ b/math/R-cran-gmp/Makefile
@@ -1,19 +1,18 @@
 # Created by: TAKATSU Tomonari <tota@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	gmp
-DISTVERSION=	0.5-13.5
-PORTREVISION=	1
+DISTVERSION=	0.5-13.6
 CATEGORIES=	math
 DISTNAME=	${PORTNAME}_${DISTVERSION}
 
 MAINTAINER=	tota@FreeBSD.org
 COMMENT=	Multiple Precision Arithmetic
 
 LICENSE=	GPLv2+
 
 LIB_DEPENDS=	libgmp.so:math/gmp
 
 USES=	cran:auto-plist,compiles
 
 .include <bsd.port.mk>
diff --git a/math/R-cran-gmp/distinfo b/math/R-cran-gmp/distinfo
index 4b7cd486eb88..6a9eb59c3247 100644
--- a/math/R-cran-gmp/distinfo
+++ b/math/R-cran-gmp/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1562429175
-SHA256 (gmp_0.5-13.5.tar.gz) = f681ab2ff3d1e379ba8ac44a8abddd08d08170723e885abc0b469b6fa8fe5510
-SIZE (gmp_0.5-13.5.tar.gz) = 133364
+TIMESTAMP = 1580248462
+SHA256 (gmp_0.5-13.6.tar.gz) = 39a61618cc9eeabd00665cc5f24721e75f0dec8268059a0d18c907c2adf85a48
+SIZE (gmp_0.5-13.6.tar.gz) = 153390