diff --git a/docs/api/upgrade-assistant.asciidoc b/docs/api/upgrade-assistant.asciidoc
index 5779dc0ec73b0..e53c593138e6c 100644
--- a/docs/api/upgrade-assistant.asciidoc
+++ b/docs/api/upgrade-assistant.asciidoc
@@ -2,7 +2,7 @@
 [[upgrade-assistant-api]]
 == Upgrade Assistant API
 
-experimental[This API is *experimental* and may be changed or removed completely in a future release. The underlying Upgrade Assistant concepts are stable, but the APIs for managing Upgrade Assistant are currently experimental.]
+experimental["This API is *experimental* and may be changed or removed completely in a future release. The underlying Upgrade Assistant concepts are stable, but the APIs for managing Upgrade Assistant are currently experimental."]
 
 The Upgrade Assistant API allows you to check the upgrade status of your Elasticsearch cluster
 and reindex indices that were created in the previous major version. The assistant helps you prepare
diff --git a/docs/api/upgrade-assistant/reindexing.asciidoc b/docs/api/upgrade-assistant/reindexing.asciidoc
index 774fb8439fedf..b20960dc6dfe8 100644
--- a/docs/api/upgrade-assistant/reindexing.asciidoc
+++ b/docs/api/upgrade-assistant/reindexing.asciidoc
@@ -1,7 +1,7 @@
 [[upgrade-assistant-api-reindexing]]
 === Reindex API
 
-experimental[This API is *experimental* and may be changed or removed completely in a future release. The underlying Upgrade Assistant concepts are stable, but the APIs for managing Upgrade Assistant are currently experimental.]
+experimental["This API is *experimental* and may be changed or removed completely in a future release. The underlying Upgrade Assistant concepts are stable, but the APIs for managing Upgrade Assistant are currently experimental."]
 
 When checking the upgrade status, some indices will have the `reindex` paramaeter set to `true`. You can use this Reindexing API to reindex these indices.
 
diff --git a/docs/api/upgrade-assistant/status.asciidoc b/docs/api/upgrade-assistant/status.asciidoc
index 21781472f7c67..e4e50570b5c3f 100644
--- a/docs/api/upgrade-assistant/status.asciidoc
+++ b/docs/api/upgrade-assistant/status.asciidoc
@@ -1,7 +1,7 @@
 [[upgrade-assistant-api-status]]
 === Upgrade Readiness Status
 
-experimental[This API is *experimental* and may be changed or removed completely in a future release. The underlying Upgrade Assistant concepts are stable, but the APIs for managing Upgrade Assistant are currently experimental.]
+experimental["This API is *experimental* and may be changed or removed completely in a future release. The underlying Upgrade Assistant concepts are stable, but the APIs for managing Upgrade Assistant are currently experimental."]
 
 ==== Request