maxmind · horgh · Feb 25, 2026 · Feb 24, 2026 · Feb 24, 2026 · Feb 24, 2026
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -2,7 +2,7 @@ cmake_minimum_required (VERSION 3.9...3.30)
 
 project(maxminddb
   LANGUAGES C
-  VERSION 1.12.2
+  VERSION 1.13.1
 )
 set(MAXMINDDB_SOVERSION 0.0.7)
 set(CMAKE_C_STANDARD 99)

diff --git a/Changes.md b/Changes.md
@@ -1,4 +1,8 @@
-## 1.13.0
+## 1.13.1 - 2026-02-24
+
+- Re-release for Ubuntu PPA. No code changes.
+
+## 1.13.0 - 2026-02-24
 
 - `MMDB_get_entry_data_list()` now validates that the claimed array/map size is
   plausible given the remaining bytes in the data section. A crafted database

diff --git a/NOTICE b/NOTICE
@@ -1,4 +1,4 @@
-Copyright 2013-2025 MaxMind, Inc.
+Copyright 2013-2026 MaxMind, Inc.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.

diff --git a/README.dev.md b/README.dev.md
@@ -48,9 +48,8 @@ version updated promptly for some reason.
 
 # Prerequisites for releasing
 
-- Required packages (Ubuntu Artful): vim git-core dput build-essential autoconf
-  automake libtool git-buildpackage libfile-slurp-perl pandoc dirmngr
-  libfile-slurp-tiny-perl libdatetime-perl debhelper dh-autoreconf
+- Required packages (Ubuntu 25.10): vim git-core dput build-essential autoconf
+  automake libtool git-buildpackage lowdown dirmngr debhelper dh-autoreconf
   libipc-run3-perl libtest-output-perl devscripts
 - Install [gh](https://github.com/cli/cli/releases).
 - GitHub ssh key (e.g. in `~/.ssh/id_rsa`)

diff --git a/README.md b/README.md
@@ -150,7 +150,7 @@ Use `make safedist` to check the resulting tarball.
 
 # Copyright and License
 
-Copyright 2013-2025 MaxMind, Inc.
+Copyright 2013-2026 MaxMind, Inc.
 
 Licensed under the Apache License, Version 2.0 (the "License"); you may not use
 this file except in compliance with the License. You may obtain a copy of the

diff --git a/configure.ac b/configure.ac
@@ -2,7 +2,7 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.63])
-AC_INIT([libmaxminddb], [1.12.2], [support@maxmind.com])
+AC_INIT([libmaxminddb], [1.13.1], [support@maxmind.com])
 AC_CONFIG_SRCDIR([include/maxminddb.h])
 AC_CONFIG_HEADERS([config.h include/maxminddb_config.h])
 

diff --git a/dev-bin/ppa-release.sh b/dev-bin/ppa-release.sh
@@ -4,16 +4,22 @@ set -e
 set -x
 set -u
 
-DISTS=( groovy focal bionic xenial trusty )
+DISTS=( questing noble jammy )
 
-VERSION=$(perl -MFile::Slurp::Tiny=read_file -MDateTime <<EOF
-use v5.16;
-my \$log = read_file(q{Changes.md});
-\$log =~ /^## (\d+\.\d+\.\d+) - (\d{4}-\d{2}-\d{2})/;
-die 'Release time is not today!' unless DateTime->now->ymd eq \$2;
-say \$1;
-EOF
-)
+changelog_header=$(head -n 3 Changes.md)
+if [[ ! $changelog_header =~ ^##\ ([0-9]+\.[0-9]+\.[0-9]+)\ -\ ([0-9]{4}-[0-9]{2}-[0-9]{2}) ]]; then
+    echo "Could not find version in Changes.md!"
+    exit 1
+fi
+VERSION="${BASH_REMATCH[1]}"
-changelog_header=$(head -n 3 Changes.md)
-if [[ ! $changelog_header =~ ^##\ ([0-9]+\.[0-9]+\.[0-9]+)\ -\ ([0-9]{4}-[0-9]{2}-[0-9]{2}) ]]; then
-    echo "Could not find version in Changes.md!"
-    exit 1
-fi
-VERSION="${BASH_REMATCH[1]}"
+changelog_header=$(head -n 1 Changes.md)
+if [[ ! $changelog_header =~ ^##\ ([0-9]+\\.[0-9]+\\.[0-9]+(?:-[a-zA-Z0-9.-]*)?)\ -\ ([0-9]{4}-[0-9]{2}-[0-9]{2}) ]]; then
+    echo "Could not find version and date in Changes.md header!"
+    exit 1
+fi
+VERSION="${BASH_REMATCH[1]}"
+DATE="${BASH_REMATCH[2]}"
+
+if [[ "$DATE" != "$(date +"%Y-%m-%d")" ]]; then
+    echo "Release date ($DATE) in Changes.md is not today!"
+    exit 1
+fi
-changelog_header=$(head -n 3 Changes.md)
-if [[ ! $changelog_header =~ ^##\ ([0-9]+\.[0-9]+\.[0-9]+)\ -\ ([0-9]{4}-[0-9]{2}-[0-9]{2}) ]]; then
-    echo "Could not find version in Changes.md!"
-    exit 1
-fi
-VERSION="${BASH_REMATCH[1]}"
+changelog_header=$(head -n 1 Changes.md)
+if [[ ! $changelog_header =~ ^##\ ([0-9]+\\.[0-9]+\\.[0-9]+(?:-[a-zA-Z0-9.-]*)?)\ -\ ([0-9]{4}-[0-9]{2}-[0-9]{2}) ]]; then
+    echo "Could not find version and date in Changes.md header!"
+    exit 1
+fi
+VERSION="${BASH_REMATCH[1]}"
+DATE="${BASH_REMATCH[2]}"
+
+if [[ "$DATE" != "$(date +"%Y-%m-%d")" ]]; then
+    echo "Release date ($DATE) in Changes.md is not today!"
+    exit 1
+fi
+DATE="${BASH_REMATCH[2]}"
+
+if [[ "$DATE" != "$(date +"%Y-%m-%d")" ]]; then
+    echo "$DATE is not today!"
+    exit 1
+fi
+
+git push
 
 RESULTS=/tmp/build-libmaxminddb-results/
 SRCDIR="$RESULTS/libmaxminddb"
@@ -51,3 +57,7 @@ dch -v "$VERSION-0+maxmind1" -D "${DISTS[0]}" -u low "New upstream release."
 git add debian/changelog
 git commit -m "Update debian/changelog for $VERSION"
 git push
+
+popd
+
+git pull
diff --git a/dev-bin/release.sh b/dev-bin/release.sh
@@ -81,17 +81,14 @@ if [ -n "$(git status --porcelain)" ]; then
     exit 1
 fi
 
-old_version=$(
-    perl -MFile::Slurp=read_file <<EOF
-use v5.16;
-my \$conf = read_file(q{configure.ac});
-\$conf =~ /AC_INIT.+\[(\d+\.\d+\.\d+)\]/;
-say \$1;
-EOF
-)
+ac_init=$(grep AC_INIT configure.ac)
+if [[ ! $ac_init =~ \[([0-9]+\.[0-9]+\.[0-9]+)\] ]]; then
-if [[ ! $ac_init =~ \[([0-9]+\.[0-9]+\.[0-9]+)\] ]]; then
+if [[ ! $ac_init =~ \["([0-9]+\\.[0-9]+\\.[0-9]+(?:-[a-zA-Z0-9.-]*)?)"\] ]]; then
-if [[ ! $ac_init =~ \[([0-9]+\.[0-9]+\.[0-9]+)\] ]]; then
+if [[ ! $ac_init =~ \["([0-9]+\\.[0-9]+\\.[0-9]+(?:-[a-zA-Z0-9.-]*)?)"\] ]]; then
+    echo "Could not find version in configure.ac!"
+    exit 1
+fi
+old_version="${BASH_REMATCH[1]}"
 
-perl -MFile::Slurp=edit_file -e \
-    "edit_file { s/\Q$old_version/$version/g } \$_ for qw( configure.ac include/maxminddb.h CMakeLists.txt )"
+perl -pi -e "s/\Q$old_version/$version/g" configure.ac include/maxminddb.h CMakeLists.txt
 
 if [ -n "$(git status --porcelain)" ]; then
     git diff

diff --git a/doc/libmaxminddb.md b/doc/libmaxminddb.md
@@ -896,7 +896,7 @@ This library was written by Boris Zentner (bzentner@maxmind.com) and Dave Rolsky
 
 # COPYRIGHT AND LICENSE
 
-Copyright 2013-2025 MaxMind, Inc.
+Copyright 2013-2026 MaxMind, Inc.
 
 Licensed under the Apache License, Version 2.0 (the "License"); you may not use
 this file except in compliance with the License. You may obtain a copy of the

diff --git a/doc/mmdblookup.md b/doc/mmdblookup.md
@@ -86,7 +86,7 @@ This utility was written by Boris Zentner (bzentner@maxmind.com) and Dave Rolsky
 
 # COPYRIGHT AND LICENSE
 
-Copyright 2013-2025 MaxMind, Inc.
+Copyright 2013-2026 MaxMind, Inc.
 
 Licensed under the Apache License, Version 2.0 (the "License"); you may not use
 this file except in compliance with the License. You may obtain a copy of the

diff --git a/t/maxmind-db b/t/maxmind-db
+9 −0		.precious.toml
+190 −194		MaxMind-DB-spec.md
+25 −3		README.md
+9 −6		bad-data/README.md
+66 −3		cmd/write-test-data/main.go
+12 −4		pkg/writer/baddata.go
+12 −12		pkg/writer/rawmmdb.go
+10 −7		test-data/README.md