diff --git a/docs/product/relay/options.mdx b/docs/product/relay/options.mdx
index b1d8211dba74c..c04f0937cf8ed 100644
--- a/docs/product/relay/options.mdx
+++ b/docs/product/relay/options.mdx
@@ -62,7 +62,7 @@ These settings fine tune caching of project states.
 
 | key                             | type    | value            | description                                                                                                                                                                                                                     |
 | ------------------------------- | ------- | ---------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| spool.envelopes.path            | String  | default: `null`  | The path to the spool file used to save envelopes to disk. If provided, enables on-disk spooling. Relay will create the directory structure if needed. Note that `~` is interpreted as a literal and not as the home directory. |
+| spool.envelopes.path            | String  | default: `null`  | The path to the spool file used to save envelopes to disk. If provided, enables on-disk spooling. Relay will create the directory structure if needed. Note that `~` is interpreted as a literal and not as the home directory. Note that only `/etc/relay` and `/work` are writable in the container. The path must be a subdirectory of one of these folders. |
 | spool.envelopes.max_memory_size | String  | default: `500MB` | The maximum in-memory buffer for incoming envelopes. The buffer will be spooled to disk when the configured size is reached.                                                                                                    |
 | spool.envelopes.max_disk_size   | String  | default: `500MB` | The maximum on-disk spool size.                                                                                                                                                                                                 |
 | spool.envelopes.max_connections | Integer | default: `20`    | The maximum number of connections in the pool to manage on-disk spooling.                                                                                                                                                       |