diff --git a/docs/conf.py b/docs/conf.py
index 8bb2bf953..09daf8877 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -120,7 +120,6 @@
     "enquiries": default_extension_version,
     "location": default_extension_version,
     "lots": default_extension_version,
-    "milestone_documents": default_extension_version,
     "participation_fee": default_extension_version,
     "process_title": default_extension_version,
 }
diff --git a/docs/schema/reference.md b/docs/schema/reference.md
index 9d7926037..334cc758c 100644
--- a/docs/schema/reference.md
+++ b/docs/schema/reference.md
@@ -402,10 +402,6 @@ Notes:
 
 * The `dateModified` field should be changed whenever the progress towards a milestone is reviewed, and the `status` either updated, or re-confirmed. 
 
-```{extensionlist} The following extensions to milestone are available
-:list: milestones
-```
-
 ### Value
 
 Financial values should be published with a currency attached.