diff --git a/worksheets/rollups/create.http b/worksheets/rollups/create.http
index 2949c986d..b4e5a7274 100644
--- a/worksheets/rollups/create.http
+++ b/worksheets/rollups/create.http
@@ -16,12 +16,15 @@ Content-Type: application/json
     "description": "An example rollup",
     "source_index": "nyc-taxi-data",
     "target_index": "rollup-test-index",
+    "target_index_settings": {
+      "index.codec": "zlib"
+    },
     "page_size": 10,
     "delay": 0,
     "continuous": false,
     "dimensions": [{
       "date_histogram": {
-          "source_field": "timestamp",
+          "source_field": "tpep_pickup_datetime",
           "fixed_interval": "1h"
       }
     }, {