diff --git a/docs/modules/spark-k8s/pages/usage-guide/spark-connect.adoc b/docs/modules/spark-k8s/pages/usage-guide/spark-connect.adoc
index 009e4aba..af9d5a79 100644
--- a/docs/modules/spark-k8s/pages/usage-guide/spark-connect.adoc
+++ b/docs/modules/spark-k8s/pages/usage-guide/spark-connect.adoc
@@ -57,6 +57,7 @@ The connect server seems to ignore the `spark.eventLog` properties while also pr
 The following features are not supported by the Stackable Spark operator yet
 
 * Authorization and authentication. Currently, anyone with access to the Spark Connect service can run jobs.
+* S3Connection references are not supported yet
 * Volumes and volume mounts can be added only with pod overrides.
 * Job dependencies must be provisioned as custom images or via `--packages` or `--jars` arguments.