diff --git a/.gitignore b/.gitignore
index 050dcab..e6b1c37 100644
--- a/.gitignore
+++ b/.gitignore
@@ -43,3 +43,4 @@ octave-3.2.4.tar.bz2
 /octave-7.2.0.tar.lz
 /octave-7.3.0.tar.lz
 /octave-7.3.0-docs.tar.xz
+/octave-8.1.0.tar.lz
diff --git a/ab6d276f6fcb b/ab6d276f6fcb
deleted file mode 100644
index df6f60c..0000000
--- a/ab6d276f6fcb
+++ /dev/null
@@ -1,43 +0,0 @@
-
-# HG changeset patch
-# User Rik <rik@octave.org>
-# Date 1668451079 28800
-# Node ID ab6d276f6fcb90631131eeb6668efd4f54a36204
-# Parent  662499ba0d21173006f99fc3b14b9a76a0e8670a
-build: Enable building of Qt documentation with Texinfo >= 7.0 (bug #62648).
-
-* doc/interpreter/mk-qthelp.pl: Update regular expressions that find the start
-of data in index.html and Function-index.html to include additional pattern
-generated by Texinfo 7.0.
-
-diff --git a/doc/interpreter/mk-qthelp.pl b/doc/interpreter/mk-qthelp.pl
---- a/doc/interpreter/mk-qthelp.pl
-+++ b/doc/interpreter/mk-qthelp.pl
-@@ -26,8 +26,11 @@
- open (my $HTML, "<", $htmlfname) or die "Unable to open $htmlfname";
- 
- # Skip through preamble of file to find start of list
--while (($_ = <$HTML>) !~ /^<div class="contents">/ ) {;}
--while (($_ = <$HTML>) !~ /^<ul class="no-bullet">/ ) {;}
-+while (defined ($_ = <$HTML>) and ! /^<div class="contents">/ ) {;}
-+while (defined ($_ = <$HTML>)
-+         and ! /^<ul class="(?:no-bullet|toc-numbered-mark)">/ ) {;}
-+
-+die "index.html: reached EOF without finding data start pattern" if eof ($HTML);
- 
- $level = 0;
- while (<$HTML>)
-@@ -68,7 +71,11 @@
- open ($HTML, "<", $htmlfname) or die "Unable to open $htmlfname";
- 
- # Skip through preamble of file to find start of list
--while (($_ = <$HTML>) !~ /^<table class="index-fn/ ) {;}
-+while (defined ($_ = <$HTML>)
-+         and ! /^<table class="(?:index-fn|fn-entries)/ ) {;}
-+
-+die "Function-Index.html: reached EOF without finding data start pattern"
-+  if eof ($HTML);
- 
- while (<$HTML>)
- {
-
diff --git a/macros.octave b/macros.octave
index 62e5ecf..8c56a98 100644
--- a/macros.octave
+++ b/macros.octave
@@ -66,7 +66,7 @@ fi \
 # octave can find the package, then remove 'octave_packages' again, and re-strip
 # any shared objects.
 %octave_pkg_check \
-%octave_cmd pkg("prefix","%{buildroot}%{octprefix}","%{buildroot}%{octarchprefix}");pkg("local_list",fullfile("%{buildroot}%{octshareprefix}","octave_packages"));pkg("list");pkg("install","-verbose",glob("%{_builddir}/%{buildsubdir}/build/%{octpkg}-%{version}-*.tar.gz"){1,1});pkg("load","%{octpkg}");pkg("list");runtests("%{buildroot}%{octpkgdir}");unlink(pkg("local_list")); \
+%octave_cmd pkg("prefix","%{buildroot}%{octprefix}","%{buildroot}%{octarchprefix}");pkg("local_list",fullfile("%{buildroot}%{octshareprefix}","octave_packages"));pkg("list");pkg("install","-verbose",glob("%{_builddir}/%{buildsubdir}/build/%{octpkg}-%{version}-*.tar.gz"){1,1});pkg("load","%{octpkg}");pkg("list");oruntests("%{buildroot}%{octpkgdir}");unlink(pkg("local_list")); \
 /usr/lib/rpm/brp-strip %{__strip} \
 %{nil}
 
diff --git a/octave.spec b/octave.spec
index d7adcff..5f18ba8 100644
--- a/octave.spec
+++ b/octave.spec
@@ -1,5 +1,5 @@
 # From src/version.h:#define OCTAVE_API_VERSION
-%global octave_api api-v57
+%global octave_api api-v58
 
 %global macrosdir %(d=%{_rpmconfigdir}/macros.d; [ -d $d ] || d=%{_sysconfdir}/rpm; echo $d)
 
@@ -36,8 +36,8 @@
 
 Name:           octave
 Epoch:          6
-Version:        7.3.0
-Release:        4%{?dist}
+Version:        8.1.0
+Release:        1%{?dist}
 Summary:        A high-level language for numerical computations
 License:        GPLv3+
 URL:            http://www.octave.org
@@ -50,9 +50,6 @@ Source2:        xorg.conf
 %if !%{builddocs}
 Source3:        octave-%{version}-docs.tar.xz
 %endif
-# Infinite loop with texinfo 7
-# https://savannah.gnu.org/bugs/index.php?63810
-Patch0:         https://hg.savannah.gnu.org/hgweb/octave/raw-rev/ab6d276f6fcb
 # Add needed time.h header
 Patch2:         octave-time.patch
 
@@ -117,7 +114,7 @@ BuildRequires:  mesa-libGL-devel
 BuildRequires:  mesa-libGLU-devel
 BuildRequires:  mesa-libOSMesa-devel
 BuildRequires:  ncurses-devel
-BuildRequires:  pcre-devel
+BuildRequires:  pcre2-devel
 BuildRequires:  portaudio-devel
 BuildRequires:  qhull-devel
 BuildRequires:  qrupdate-devel
@@ -415,9 +412,9 @@ make check
 %{_bindir}/octave*
 %dir %{_libdir}/octave/
 %dir %{_libdir}/octave/%{version}
-%{_libdir}/octave/%{version}/liboctave.so.9*
-%{_libdir}/octave/%{version}/liboctgui.so.8*
-%{_libdir}/octave/%{version}/liboctinterp.so.10*
+%{_libdir}/octave/%{version}/liboctave.so.10*
+%{_libdir}/octave/%{version}/liboctgui.so.9*
+%{_libdir}/octave/%{version}/liboctinterp.so.11*
 %{_libdir}/octave/%{version}/mkoctfile-%{version}
 %{_libdir}/octave/%{version}/oct/
 %{_libdir}/octave/%{version}/octave-config-%{version}
@@ -461,6 +458,10 @@ make check
 %{_pkgdocdir}/refcard*.pdf
 
 %changelog
+* Sat Apr 08 2023 Orion Poplawski <orion@nwra.com> - 6:8.1.0-1
+- Update to 8.1.0
+- Build with pcre2 (bz#2128340)
+
 * Fri Mar 17 2023 Orion Poplawski <orion@nwra.com> - 6:7.3.0-4
 - Add upstream patch to fix doc builds
 
diff --git a/sources b/sources
index 28a1449..50a7e49 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (octave-7.3.0.tar.lz) = 8448aa01fa2a0650993ff9e4a4a017c243d5bf4af17cc321458e583913f4a71c2a34d60c1f79b8fedd5f00604f0960b94a4e2c0d9b87f07b13e969afe2951aa2
+SHA512 (octave-8.1.0.tar.lz) = 0c14a9c682cc4da5b6e3c6d018d082ed53cdfd13e9f42ca5afae2d499ef6aa1a19f3fb5b5a9cc006e28f24c45e6c1df298487a7f2d37d886385e427f984e6832