diff --git a/math/ocaml-zarith/Makefile b/math/ocaml-zarith/Makefile
index ab95d248427a..7e02f8db6812 100644
--- a/math/ocaml-zarith/Makefile
+++ b/math/ocaml-zarith/Makefile
@@ -1,41 +1,40 @@
 PORTNAME=	${GH_PROJECT:tl}
-PORTVERSION=	1.12
+PORTVERSION=	1.13
 DISTVERSIONPREFIX=	release-
-PORTREVISION=	1
 CATEGORIES=	math
 PKGNAMEPREFIX=	ocaml-
 
 MAINTAINER=	danfe@FreeBSD.org
 COMMENT=	OCaml arithmetic library for arbitrary precision integers
 WWW=		https://forge.ocamlcore.org/projects/zarith
 
 LICENSE=	LGPL20
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 LIB_DEPENDS=	libgmp.so:math/gmp
 
 USES=		gmake localbase:ldflags tar:tgz
 USE_GITHUB=	yes
 GH_ACCOUNT=	ocaml
 GH_PROJECT=	Zarith
 USE_OCAML=	yes
 USE_OCAML_FINDLIB=	yes
 OCAMLFIND_LDCONF=	/dev/null
 HAS_CONFIGURE=	yes
 ALL_TARGET=	all
 CONFIGURE_ENV=	DESTDIR=${STAGEDIR}
 
 MAKE_JOBS_UNSAFE=	yes
 
 PORTDOCS=	html
 DOCSDIR=	${OCAML_DOCSDIR}/${PORTNAME}
 
 OPTIONS_DEFINE=	DOCS
 
 DOCS_ALL_TARGET=doc
 
 post-install-DOCS-on:
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	${MV} ${WRKSRC}/html ${STAGEDIR}${DOCSDIR}
 
 .include <bsd.port.mk>
diff --git a/math/ocaml-zarith/distinfo b/math/ocaml-zarith/distinfo
index 3e2235e7d2c6..2df68dba1013 100644
--- a/math/ocaml-zarith/distinfo
+++ b/math/ocaml-zarith/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1614762000
-SHA256 (ocaml-Zarith-release-1.12_GH0.tar.gz) = cc32563c3845c86d0f609c86d83bf8607ef12354863d31d3bffc0dacf1ed2881
-SIZE (ocaml-Zarith-release-1.12_GH0.tar.gz) = 93695
+TIMESTAMP = 1689789526
+SHA256 (ocaml-Zarith-release-1.13_GH0.tar.gz) = a5826d33fea0103ad6e66f92583d8e075fb77976de893ffdd73ada0409b3f83b
+SIZE (ocaml-Zarith-release-1.13_GH0.tar.gz) = 85994
diff --git a/math/ocaml-zarith/files/patch-configure b/math/ocaml-zarith/files/patch-configure
index 6ce8fe8ee40b..977b654adb40 100644
--- a/math/ocaml-zarith/files/patch-configure
+++ b/math/ocaml-zarith/files/patch-configure
@@ -1,20 +1,20 @@
---- configure.orig	2021-03-03 09:00:00 UTC
+--- configure.orig	2023-07-19 17:58:46 UTC
 +++ configure
-@@ -268,7 +268,7 @@ searchbin ocamlfind
- if test $? -eq 1 -a $ocamlfind != "no"; then 
+@@ -258,7 +258,7 @@ searchbin ocamlfind
+ if test $? -eq 1 && test $ocamlfind != "no"; then 
      instmeth='findlib'
      if test "$installdir" = "auto"
 -    then installdir=`ocamlfind printconf destdir`; fi
 +    then installdir=`ocamlfind printconf destdir | sed 's/:.*//'`; fi
  else
      searchbin install
      if test $? -eq 1; then instmeth='install'
-@@ -365,7 +365,7 @@ OCAMLOPTFLAGS=$mloptflags
- OCAMLINC=$mlinc
+@@ -354,7 +354,7 @@ OCAMLINC=$mlinc
  CFLAGS=$ccinc $ccdef $ccopt
  LIBS=$cclib
+ LDFLAGS=$ldflags
 -INSTALLDIR=$installdir
 +INSTALLDIR=${DESTDIR}$installdir
  INSTALL=install
  OCAMLFIND=ocamlfind
  INSTMETH=$instmeth
diff --git a/math/ocaml-zarith/pkg-plist b/math/ocaml-zarith/pkg-plist
index 844f3cadc7a0..253d07fcf0fb 100644
--- a/math/ocaml-zarith/pkg-plist
+++ b/math/ocaml-zarith/pkg-plist
@@ -1,21 +1,22 @@
 %%OCAML_SITELIBDIR%%/zarith/META
 %%OCAML_SITELIBDIR%%/zarith/big_int_Z.cmi
 %%OCAML_SITELIBDIR%%/zarith/big_int_Z.cmti
 %%OCAML_SITELIBDIR%%/zarith/big_int_Z.cmx
 %%OCAML_SITELIBDIR%%/zarith/big_int_Z.mli
 %%OCAML_SITELIBDIR%%/zarith/dllzarith.so
 %%OCAML_SITELIBDIR%%/zarith/libzarith.a
 %%OCAML_SITELIBDIR%%/zarith/q.cmi
 %%OCAML_SITELIBDIR%%/zarith/q.cmti
 %%OCAML_SITELIBDIR%%/zarith/q.cmx
 %%OCAML_SITELIBDIR%%/zarith/q.mli
 %%OCAML_SITELIBDIR%%/zarith/z.cmi
 %%OCAML_SITELIBDIR%%/zarith/z.cmti
 %%OCAML_SITELIBDIR%%/zarith/z.cmx
 %%OCAML_SITELIBDIR%%/zarith/z.mli
 %%OCAML_SITELIBDIR%%/zarith/zarith.a
 %%OCAML_SITELIBDIR%%/zarith/zarith.cma
 %%OCAML_SITELIBDIR%%/zarith/zarith.cmxa
 %%OCAML_SITELIBDIR%%/zarith/zarith.cmxs
 %%OCAML_SITELIBDIR%%/zarith/zarith.h
 %%OCAML_SITELIBDIR%%/zarith/zarith_top.cma
+%%OCAML_SITELIBDIR%%/zarith/zarith_version.cmx