diff --git a/content/en/admin/config.md b/content/en/admin/config.md
index 6f3ff4d4..cf53b5ab 100644
--- a/content/en/admin/config.md
+++ b/content/en/admin/config.md
@@ -468,6 +468,13 @@ If set, all StatsD keys will be prefixed with this. Defaults to `Mastodon.produc
 
 If set to `true`, Mastodon will log some Sidekiq metrics into StatsD. Defaults to `false`.
 
+#### `ES_CA_FILE`
+
+Override Certificate Authority bundle file to use. Useful when using self-signed certificates.
+
+**Version history:**\
+4.3.0 - added
+
 ### SMTP email delivery {#smtp}
 
 #### `SMTP_SERVER`