diff --git a/lib/behat/axe/readme_moodle.txt b/lib/behat/axe/readme_moodle.txt
new file mode 100644
index 00000000000..2095e896243
--- /dev/null
+++ b/lib/behat/axe/readme_moodle.txt
@@ -0,0 +1,15 @@
+Description of axe import into Moodle
+
+1/ Download the latest axe code somewhere (example /tmp/axe) using:
+npm install axe-core --save-dev
+Note down the version number displayed by the command, to update lib/thirdpartylibs.xml accordingly.
+
+
+2/ Copy the following file to your local Moodle directory, to replace the old one:
+cp node_modules/axe-core/axe.min.js [PATH TO YOUR MOODLE]/lib/behat/axe/
+
+
+3/ Run behat tests labelled with @accessibility and confirm they are passing with the new library version, or fix the failures
+because the new version might raise issues that weren't detected previously:
+php admin/tool/behat/cli/init.php --axe
+php admin/tool/behat/cli/run.php --tags=@accessibility
diff --git a/lib/thirdpartylibs.xml b/lib/thirdpartylibs.xml
index f7a4b52baeb..a1658595cad 100644
--- a/lib/thirdpartylibs.xml
+++ b/lib/thirdpartylibs.xml
@@ -11,7 +11,7 @@
     <location>behat/axe</location>
     <name>axe-core</name>
     <license>MPL</license>
-    <version>3.5.5</version>
+    <version>4.3.5</version>
     <licenseversion>2.0</licenseversion>
   </library>
   <library>