diff --git a/lib/editor/atto/plugins/html/thirdpartylibs.xml b/lib/editor/atto/plugins/html/thirdpartylibs.xml
index c5c62d3729d..324872bf012 100644
--- a/lib/editor/atto/plugins/html/thirdpartylibs.xml
+++ b/lib/editor/atto/plugins/html/thirdpartylibs.xml
@@ -4,7 +4,7 @@
     <location>yui/src/codemirror</location>
     <name>codemirror</name>
     <description>CodeMirror is a versatile text editor implemented in JavaScript for the browser.</description>
-    <version>5.65.0</version>
+    <version>5.65.9</version>
     <license>MIT</license>
     <repository>https://github.com/codemirror/CodeMirror</repository>
   </library>
diff --git a/lib/editor/atto/plugins/html/yui/src/codemirror/readme_moodle.txt b/lib/editor/atto/plugins/html/yui/src/codemirror/readme_moodle.txt
index a9a720088c2..abcdc60f431 100644
--- a/lib/editor/atto/plugins/html/yui/src/codemirror/readme_moodle.txt
+++ b/lib/editor/atto/plugins/html/yui/src/codemirror/readme_moodle.txt
@@ -3,16 +3,21 @@ Description of importing the codemirror library into Moodle.
 NOTE: To make it more readable, in this explanation [LIBRARYPATH] means:
     [PATH TO YOUR MOODLE]/lib/editor/atto/plugins/html/yui/src/codemirror
 
-1 Download the latest codemirror code somewhere (example /tmp/cm) using: npm install codemirror
+1 Download the latest codemirror code somewhere (example /tmp/cm) using: npm install codemirror OR download the zip file
   (note down the version number displayed by the command, you'll need it later)
 
 2 Then copy the following files to your local Moodle directory:
+If using npm install:
+[CODEMIRRORPATH] = node_modules
 
-cp node_modules/codemirror/lib/codemirror.js [LIBRARYPATH]/js
-cp node_modules/codemirror/mode/css/css.js [LIBRARYPATH]/js
-cp node_modules/codemirror/mode/htmlmixed/htmlmixed.js [LIBRARYPATH]/js
-cp node_modules/codemirror/mode/javascript/javascript.js [LIBRARYPATH]/js
-cp node_modules/codemirror/mode/xml/xml.js [LIBRARYPATH]/js
+If using the zip file:
+[CODEMIRRORPATH] = codemirror-X.XX.X
+
+cp [CODEMIRRORPATH]/codemirror/lib/codemirror.js [LIBRARYPATH]/js
+cp [CODEMIRRORPATH]/codemirror/mode/css/css.js [LIBRARYPATH]/js
+cp [CODEMIRRORPATH]/codemirror/mode/htmlmixed/htmlmixed.js [LIBRARYPATH]/js
+cp [CODEMIRRORPATH]/codemirror/mode/javascript/javascript.js [LIBRARYPATH]/js
+cp [CODEMIRRORPATH]/codemirror/mode/xml/xml.js [LIBRARYPATH]/js
 
 3 Rebuild the module by:
     cd [PATH TO YOUR MOODLE]/lib/editor/atto/plugins/html/yui/src/