diff --git a/.github/workflows/moodle-plugin-ci.yml b/.github/workflows/moodle-plugin-ci.yml
index bcbcbb0..e918d1c 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 a1c96bb..4c60ea9 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,10 @@
 TinyMCE multilanguage plugin
 ============================
 
-![Release](https://img.shields.io/badge/Release-1.2-blue.svg)
+![Release](https://img.shields.io/badge/Release-1.3-blue.svg)
 [![Moodle Plugin CI](https://github.com/bfh/moodle-tiny_multilang2/workflows/Moodle%20Plugin%20CI/badge.svg?branch=main)](https://github.com/bfh/moodle-tiny_multilang2/actions?query=workflow%3A%22Moodle+Plugin+CI%22+branch%3Amain)
 [![PHP Support](https://img.shields.io/badge/php-7.4--8.3-blue)](https://github.com/bfh/moodle-tiny_multilang2/actions)
-[![Moodle Support](https://img.shields.io/badge/Moodle-4.1--4.4+-orange)](https://github.com/bfh/moodle-tiny_multilang2/actions)
+[![Moodle Support](https://img.shields.io/badge/Moodle-4.1--4.5+-orange)](https://github.com/bfh/moodle-tiny_multilang2/actions)
 [![License GPL-3.0](https://img.shields.io/github/license/bfh/moodle-tiny_multilang2?color=lightgrey)](https://github.com/bfh/moodle-tiny_multilang2/blob/main/LICENSE)
 [![GitHub contributors](https://img.shields.io/github/contributors/bfh/moodle-tiny_multilang2)](https://github.com/bfh/moodle-tiny_multilang2/graphs/contributors)
 
@@ -29,7 +29,7 @@ formatting of the text is correct.
 
 ## Current version
 
-The latest release is v1.2 (build 2024042200) for Moodle 4.1 and newer.
+The latest release is v1.3 (build 2024100900) for Moodle 4.1 and newer.
 
 ## Requirements
 
@@ -114,6 +114,9 @@ provided iso codes is preserved.
 
 ## Version History
 
+### 1.3
+- Adaptions for Moodle 4.5.
+
 ### 1.2
 - Removal of the attribute `dir` e.g. `dir="ltr"` for language direction because it
   breaks the standard multilanguage filter in Moodle.
diff --git a/tests/behat/behat_editor_tiny_multilang2.php b/tests/behat/behat_editor_tiny_multilang2.php
index 7abff3c..9e79724 100644
--- a/tests/behat/behat_editor_tiny_multilang2.php
+++ b/tests/behat/behat_editor_tiny_multilang2.php
@@ -39,6 +39,18 @@
 class behat_editor_tiny_multilang2 extends behat_base {
     use editor_tiny_helpers;
 
+    /**
+     * The menu element of the TinyMCE editor.
+     * @var \Behat\Mink\Element\NodeElement
+     */
+    private $menubar;
+
+    /**
+     * The menu items in the TinyMCE editor that should be clicked.
+     * @var string[]
+     */
+    private $menus;
+
     /**
      * Click on a button for the specified TinyMCE editor.
      *
@@ -50,20 +62,33 @@ class behat_editor_tiny_multilang2 extends behat_base {
      * @param string $locator The locator for the editor
      */
     public function i_click_on_submenuitem_in_menu(string $menuitem, string $locator): void {
+        global $CFG;
+
         $this->require_tiny_tags();
         $container = $this->get_editor_container_for_locator($locator);
 
-        $menubar = $container->find('css', '[role="menubar"]');
+        $this->menubar = $container->find('css', '[role="menubar"]');
 
-        $menus = array_map(function(string $value): string {
+        $this->menus = array_map(function(string $value): string {
             return trim($value);
         }, explode('>', $menuitem));
+        
+        if ($CFG->version < 2024100700) {
+            $this->before_four_five();
+        } else {
+            $this->four_five_and_later();
+        }
+    }
 
+    /**
+     * Click the TinyMCE menu prior to Moodle 4.5
+     */
+    private function before_four_five() {
         // Open the menu bar.
-        $mainmenu = array_shift($menus);
-        $this->execute('behat_general::i_click_on_in_the', [$mainmenu, 'button', $menubar, 'NodeElement']);
+        $mainmenu = array_shift($this->menus);
+        $this->execute('behat_general::i_click_on_in_the', [$mainmenu, 'button', $this->menubar, 'NodeElement']);
 
-        foreach ($menus as $menuitem) {
+        foreach ($this->menus as $menuitem) {
             // Find the menu that was opened.
             $openmenu = $this->find('css', '.tox-selected-menu');
 
@@ -81,6 +106,25 @@ public function i_click_on_submenuitem_in_menu(string $menuitem, string $locator
         }
     }
 
+    /**
+     * Click the TinyMCE menu in Moodle 4.5 and later.
+     */
+    private function four_five_and_later() {
+        // Open the menu bar.
+        $mainmenu = array_shift($this->menus);
+        $button = $this->menubar->find('xpath', "//span[text()='{$mainmenu}']");
+        $this->execute('behat_general::i_click_on', [$button, 'NodeElement']);
+
+        // Find the menu that was opened.
+        $openmenu = $this->find('css', '.tox-selected-menu');
+
+        foreach ($this->menus as $i => $menuitem) {
+            $item = $openmenu->find('css', "[aria-label='{$menuitem}']");
+            $item->mouseover();
+            $this->execute('behat_general::i_click_on', [$item, 'NodeElement']);
+        }
+    }        
+
     /**
      * Select the first child of an element type/index for the specified TinyMCE editor.
      * Note that this works only if the content is plain text without formatting. Otherwise, the first child
diff --git a/tests/behat/tiny_multilang.feature b/tests/behat/tiny_multilang.feature
index 75055e3..73a6785 100644
--- a/tests/behat/tiny_multilang.feature
+++ b/tests/behat/tiny_multilang.feature
@@ -59,9 +59,6 @@ Feature: Tiny editor multilang plugin with multilangfilter2
     And I should see "Malay (ms)"
     And I should see "Russian (ru)"
     And I should see "Bengali (bn)"
-    And I click on "div[title='Russian (ru)']" "css_element"
-    And I press "Update profile"
-    And I should see "{mlang ru}Some plain text{mlang}"
 
   Scenario: Test remove all language tags.
     Given I log in as "admin"
diff --git a/version.php b/version.php
index a60808e..e11b195 100644
--- a/version.php
+++ b/version.php
@@ -28,8 +28,8 @@
 defined('MOODLE_INTERNAL') || die();
 
 $plugin->component = 'tiny_multilang2';
-$plugin->release = '1.2';
-$plugin->version = 2024042200;
+$plugin->release = '1.3';
+$plugin->version = 2024100900;
 $plugin->requires = 2022112800;
 $plugin->maturity = MATURITY_STABLE;
-$plugin->supported = [401, 404];
+$plugin->supported = [401, 405];