diff --git a/enrol/upgrade.txt b/enrol/upgrade.txt
index bd321bd42867a..40f9682d81e76 100644
--- a/enrol/upgrade.txt
+++ b/enrol/upgrade.txt
@@ -1,6 +1,16 @@
 This files describes API changes in /enrol/* - plugins,
 information provided here is intended especially for developers.
 
+=== 2.9 ===
+
+* External function core_enrol_external::get_users_courses now returns additional optional fields:
+   - summary: Course summary.
+   - summaryformat: Course summary format.
+   - format: Course format.
+   - showgrades: True if grades are shown, otherwise false.
+   - lang: Forced course language.
+   - enablecompletion: Control or not via completion and activity settings.
+
 === 2.8 ===
 
 * enrol_plugin::instance_deleteable() is deprecated and has been replaced by enrol_plugin::can_delete_instance()
diff --git a/files/upgrade.txt b/files/upgrade.txt
new file mode 100644
index 0000000000000..e07467b81a1c4
--- /dev/null
+++ b/files/upgrade.txt
@@ -0,0 +1,11 @@
+This files describes API changes in /files/*,
+information provided here is intended especially for developers.
+
+=== 2.9 ===
+
+ * External function core_files_external::get_files returns additional optional fields:
+    - timecreated: Time created.
+    - filesize: File size.
+    - author: File owner.
+    - license: File license.
+
diff --git a/lib/upgrade.txt b/lib/upgrade.txt
index 93dbd8cdac86a..65d9ade973e9c 100644
--- a/lib/upgrade.txt
+++ b/lib/upgrade.txt
@@ -17,7 +17,6 @@ information provided here is intended especially for developers.
 * For 3rd party plugin specific environment.xml files, it's now possible to specify version independent checks by using the
   <PLUGIN name="component_name"> tag instead of the version dependent <MOODLE version="x.y"> one. If the PLUGIN tag is used any
   Moodle specific tags will be ignored.
-* External function core_files_get_files returns additional fields (timecreated, filesize, author, license)
 * html_table: new API for adding captions to tables (new field, $table->caption) and subsequently hiding said captions from sighted users using accesshide (enabled using $table->captionhide).
 * The authorization procedure in the mdeploy.php script has been improved. The script
   now relies on the main config.php when deploying an available update.
diff --git a/mod/assign/upgrade.txt b/mod/assign/upgrade.txt
index 5ed8bee13750c..41e2235478da4 100644
--- a/mod/assign/upgrade.txt
+++ b/mod/assign/upgrade.txt
@@ -1,6 +1,10 @@
 This files describes API changes in the assign code.
 === 2.9 ===
 * External parameter now returns PARAM_RAW instead of PARAM_TEXT for webservices using feedback comments.
+* External function mod_assign_external::get_assignments now returns additional optional fields:
+   - intro: Assignment intro.
+   - introformat: Intro format.
+   - introattachments: Intro attachments files.
 
 === 2.8 ===
 * Some DB changes were made to simplify the SQL required to query the latest attempt.
diff --git a/webservice/upgrade.txt b/webservice/upgrade.txt
index a7646c2e6dd90..6e457ce5b1c74 100644
--- a/webservice/upgrade.txt
+++ b/webservice/upgrade.txt
@@ -42,6 +42,12 @@ This information is intended for authors of webservices, not people writing webs
     - core_user_get_users_by_id
     - moodle_webservice_get_siteinfo
 
+* External function core_webservice_external::get_site_info now returns additional optional fields:
+   - advancedfeatures: Array listing Moodle advanced features and if enabled or not.
+   - usercanmanageownfiles: Whether the my files option is disabled.
+   - userquota: User storage quota.
+   - usermaxuploadfilesize: Files upload size limit.
+
 
 === 2.7 ===