diff --git a/.github/workflows/moodle-plugin-ci.yml b/.github/workflows/moodle-plugin-ci.yml
index 0308ab7..379e090 100644
--- a/.github/workflows/moodle-plugin-ci.yml
+++ b/.github/workflows/moodle-plugin-ci.yml
@@ -30,6 +30,24 @@ jobs:
       fail-fast: false
       matrix:
         include:
+          - php: '8.1'
+            moodle-branch: 'MOODLE_405_STABLE'
+            database: pgsql
+          - php: '8.2'
+            moodle-branch: 'MOODLE_405_STABLE'
+            database: pgsql
+          - php: '8.3'
+            moodle-branch: 'MOODLE_405_STABLE'
+            database: pgsql
+          - php: '8.1'
+            moodle-branch: 'MOODLE_405_STABLE'
+            database: mariadb
+          - php: '8.2'
+            moodle-branch: 'MOODLE_405_STABLE'
+            database: mariadb
+          - php: '8.3'
+            moodle-branch: 'MOODLE_405_STABLE'
+            database: mariadb
           - php: '8.1'
             moodle-branch: 'MOODLE_404_STABLE'
             database: pgsql
diff --git a/README.md b/README.md
index 6eb0694..8b9b131 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Moodle Tiny editor HTML Block plugin
 
-![Release](https://img.shields.io/badge/Release-1.4-blue.svg)
+![Release](https://img.shields.io/badge/Release-1.5-blue.svg)
 ![Supported](https://img.shields.io/badge/Moodle-4.1+-orange.svg)
 [![Moodle Plugin CI](https://github.com/srobotta/moodle-tiny_htmlblock/workflows/Moodle%20Plugin%20CI/badge.svg?branch=master)](https://github.com/srobotta/moodle-tiny_htmlblock/actions?query=workflow%3A%22Moodle+Plugin+CI%22+branch%3Amaster)
 [![License GPL-3.0](https://img.shields.io/github/license/srobotta/moodle-tiny_htmlblock?color=lightgrey)](https://github.com/srobotta/moodle-tiny_htmlblock/blob/master/LICENSE)
@@ -143,6 +143,9 @@ What is missing/not working:
 
 ## Version History
 
+### 1.5
+- Support for Moodle 4.5
+
 ### 1.4
 - Support Moodle 4.4 and PHP 8.3.
 - Lift software maturity to stable.
diff --git a/version.php b/version.php
index 177fa59..bf56dd1 100644
--- a/version.php
+++ b/version.php
@@ -25,8 +25,8 @@
 defined('MOODLE_INTERNAL') || die();
 
 $plugin->component = 'tiny_htmlblock';
-$plugin->release = '1.4';
-$plugin->version = 2024043000;
+$plugin->release = '1.5';
+$plugin->version = 2024100900;
 $plugin->requires = 2022112800;
 $plugin->maturity = MATURITY_STABLE;
-$plugin->supported = [401, 404];
+$plugin->supported = [401, 405];