diff --git a/math/mathmod/Makefile b/math/mathmod/Makefile
index bdaa5a1e05f7..f38d771ff5cb 100644
--- a/math/mathmod/Makefile
+++ b/math/mathmod/Makefile
@@ -2,8 +2,7 @@
 # $FreeBSD$
 
 PORTNAME=	MathMod
-PORTVERSION=	9.0
-PORTREVISION=	1
+PORTVERSION=	9.1
 CATEGORIES=	math graphics
 
 MAINTAINER=	thierry@FreeBSD.org
diff --git a/math/mathmod/distinfo b/math/mathmod/distinfo
index b76c28ec8a78..8ae17593f75f 100644
--- a/math/mathmod/distinfo
+++ b/math/mathmod/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1545240564
-SHA256 (parisolab-mathmod-9.0_GH0.tar.gz) = f9beb06861050e34811adbb4ce0d276bd9f6e5200c76f27b9dc0e5af719b4798
-SIZE (parisolab-mathmod-9.0_GH0.tar.gz) = 1137163
+TIMESTAMP = 1556136629
+SHA256 (parisolab-mathmod-9.1_GH0.tar.gz) = bb4295ed8961e67f1703fdbb0dd5046c4e2f45d652b9d3464eec6191406f6521
+SIZE (parisolab-mathmod-9.1_GH0.tar.gz) = 1137397