diff --git a/stacks/jupyterhub-pyspark-hdfs/spark_connect.yaml b/stacks/jupyterhub-pyspark-hdfs/spark_connect.yaml
index 3494d30d..275c7937 100644
--- a/stacks/jupyterhub-pyspark-hdfs/spark_connect.yaml
+++ b/stacks/jupyterhub-pyspark-hdfs/spark_connect.yaml
@@ -54,6 +54,7 @@ spec:
             configMap:
               name: hdfs
     config:
+      listenerClass: external-unstable
       resources:
         memory:
           limit: "2Gi"