diff --git a/thelounge/statefulset.yaml b/thelounge/statefulset.yaml
index 8bb4243..dbe59fe 100644
--- a/thelounge/statefulset.yaml
+++ b/thelounge/statefulset.yaml
@@ -76,6 +76,7 @@ spec:
     - metadata:
         name: config
       spec:
+        storageClassName: block-truenas
         accessModes:
           - ReadWriteOnce
         resources:
diff --git a/znc/statefulset.yaml b/znc/statefulset.yaml
index 78527b8..531ba33 100644
--- a/znc/statefulset.yaml
+++ b/znc/statefulset.yaml
@@ -73,6 +73,7 @@ spec:
     - metadata:
         name: config
       spec:
+        storageClassName: block-truenas
         accessModes:
           - ReadWriteOnce
         resources: