diff --git a/oceanstream/settings/defaults.config.json b/oceanstream/settings/defaults.config.json
index 82a4ea5..ae50727 100644
--- a/oceanstream/settings/defaults.config.json
+++ b/oceanstream/settings/defaults.config.json
@@ -18,7 +18,11 @@
       "m": null,
       "thr": -5,
       "start": 0,
-      "offset": 0
+      "offset": 0,
+      "dask_chunking": {
+        "ping_time": 100,
+        "range_sample": 100
+      }
     }
   },
   "transient": {