diff --git a/CHANGELOG.md b/CHANGELOG.md
index fec3bcf..ed2ed75 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,7 @@ All notable changes to PL/php are documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and the project aims to follow [Semantic Versioning](https://semver.org/).
 
-## [Unreleased]
+## [2.3.0] — 2026-07-06
 
 ### Added
 
diff --git a/Makefile b/Makefile
index 17c2122..6355fa7 100644
--- a/Makefile
+++ b/Makefile
@@ -16,7 +16,7 @@ MODULE_big = plphp
 OBJS = plphp.o plphp_io.o plphp_spi.o
 
 EXTENSION = plphp
-DATA = plphp--2.2.sql plphp--2.0--2.1.sql plphp--2.1--2.2.sql
+DATA = plphp--2.3.sql plphp--2.0--2.1.sql plphp--2.1--2.2.sql plphp--2.2--2.3.sql
 
 # PHP embed SAPI compile/link flags, discovered via php-config.
 PHP_CONFIG ?= php-config
diff --git a/plphp--2.2--2.3.sql b/plphp--2.2--2.3.sql
new file mode 100644
index 0000000..4181737
--- /dev/null
+++ b/plphp--2.2--2.3.sql
@@ -0,0 +1,11 @@
+/* Upgrade PL/php from 2.2 to 2.3.
+ *
+ * 2.3 adds VARIADIC parameter support, converts array columns inside rows
+ * to PHP arrays, adds CI, supports PHP 8.1 through 8.4, and hardens the
+ * interpreter against host php.ini settings.  All of it lives in the C
+ * module, which PostgreSQL loads by path, so there is nothing to change at
+ * the SQL level.
+ */
+
+-- complain if script is sourced in psql, rather than via ALTER EXTENSION
+\echo Use "ALTER EXTENSION plphp UPDATE" to load this file. \quit
diff --git a/plphp--2.2.sql b/plphp--2.3.sql
similarity index 100%
rename from plphp--2.2.sql
rename to plphp--2.3.sql
diff --git a/plphp.control b/plphp.control
index eaaec54..1467efc 100644
--- a/plphp.control
+++ b/plphp.control
@@ -5,6 +5,6 @@
 # the server's OS user.  The extension is therefore superuser-only to install
 # and the language is created without the TRUSTED attribute.
 comment = 'PL/php procedural language (untrusted)'
-default_version = '2.2'
+default_version = '2.3'
 module_pathname = '$libdir/plphp'
 relocatable = false