diff --git a/.github/workflows/moodle-plugin-ci.yml b/.github/workflows/moodle-plugin-ci.yml
index 4cf22fa..387e678 100644
--- a/.github/workflows/moodle-plugin-ci.yml
+++ b/.github/workflows/moodle-plugin-ci.yml
@@ -31,7 +31,7 @@ jobs:
       fail-fast: false
       matrix:
         php: ['8.0', '8.1', '8.2']
-        moodle-branch: ['MOODLE_402_STABLE']
+        moodle-branch: ['MOODLE_403_STABLE']
         database: [pgsql, mariadb]
 
     steps:
diff --git a/CHANGES.md b/CHANGES.md
index 6ccb05a..b91351c 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -4,6 +4,10 @@ moodle-block_cohortspecifichtml
 Changes
 -------
 
+### Unreleased
+
+* 2023-10-20 - Prepare compatibility for Moodle 4.3.
+
 ### v4.2-r2
 
 * 2023-10-23 - Adopt Moodle core change in block_html from MDL-77164
diff --git a/README.md b/README.md
index ffa1765..5869830 100755
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ This Text block provides the possibility to selectively display the block to mem
 Requirements
 ------------
 
-This plugin requires Moodle 4.2+
+This plugin requires Moodle 4.3+
 
 
 Motivation for this plugin
diff --git a/version.php b/version.php
index ee8b6bb..4b3fdc7 100644
--- a/version.php
+++ b/version.php
@@ -27,7 +27,7 @@
 $plugin->component = 'block_cohortspecifichtml';
 $plugin->version = 2023090101;
 $plugin->release = 'v4.2-r2';
-$plugin->requires = 2023042400;
-$plugin->supported = [402, 402];
+$plugin->requires = 2023100900;
+$plugin->supported = [403, 403];
 $plugin->maturity = MATURITY_STABLE;
-$plugin->dependencies = ['block_html' => 2023042400];
+$plugin->dependencies = ['block_html' => 2023100900];