diff --git a/src/stats/stats.core.js b/src/stats/stats.core.js
index d96b11f..f5343de 100644
--- a/src/stats/stats.core.js
+++ b/src/stats/stats.core.js
@@ -49,6 +49,9 @@ const stats = (georaster, geometry, calcStatsOptions, test, { debug_level = 0, i
         geometry = polygon([georaster.xmin, georaster.ymin, georaster.xmax, georaster.ymax]);
       } else if (validate(geometry)) {
         geometry = polygon(geometry);
+      } else if (utils.isBboxObj(geometry)) {
+        // convert { xmin: 20, xmax: 32, ymin: -3, ymax: 0 } to geojson polygon
+        geometry = polygon([geometry.xmin, geometry.ymin, geometry.xmax, geometry.ymax]);
       }
     }
 
diff --git a/src/sum/index.js b/src/sum/index.js
index 75659af..0ced398 100644
--- a/src/sum/index.js
+++ b/src/sum/index.js
@@ -19,5 +19,5 @@ import stat from "../stat";
  * [217461, 21375, 57312, 457125]
  */
 export default function sum(georaster, geometry, test) {
-  return QuickPromise.resolve(stat(georaster, geometry, "sum", test, { rescale: true, vrm: "minimal" }));
+  return stat(georaster, geometry, "sum", test, { rescale: true, vrm: "minimal" });
 }
diff --git a/src/sum/sum.test.js b/src/sum/sum.test.js
index da5639d..7b17461 100644
--- a/src/sum/sum.test.js
+++ b/src/sum/sum.test.js
@@ -13,7 +13,7 @@ import sum from ".";
 
 const { fetchJson, fetchJsons } = utils;
 
-const { port } = serve({ debug: true, max: 100, port: 8888, wait: 120 });
+const { port } = serve({ debug: true, max: 31, port: 8888, wait: 120 });
 
 const urlRwanda = `http://localhost:${port}/data/RWA_MNH_ANC.tif`;
 const bboxRwanda = require("../../data/RwandaBufferedBoundingBox.json");
@@ -59,6 +59,7 @@ test("(Legacy) Get Sum from Veneto Geonode", async ({ eq }) => {
   ];
   const [georaster, geojson] = values;
   const results = sum(georaster, geojson);
+  eq(Array.isArray(results), true);
   const actualValue = Number(results[0].toFixed(2));
   const expectedValue = 24_943.31; // rasterstats says 24,963.465454101562
   eq(actualValue, expectedValue);
diff --git a/src/utils/utils.module.js b/src/utils/utils.module.js
index 91255e6..5e5034b 100644
--- a/src/utils/utils.module.js
+++ b/src/utils/utils.module.js
@@ -122,6 +122,18 @@ const utils = {
     return Array.isArray(parsed) ? parsed[0] : parsed;
   },
 
+  // checks if bbox in form { xmin: 20, xmax: 32, ymin: -3, ymax: 0 }
+  isBboxObj(geometry) {
+    return (
+      typeof geometry === "object" &&
+      Array.isArray(geometry) === false &&
+      typeof geometry.xmin === "number" &&
+      typeof geometry.xmax === "number" &&
+      typeof geometry.ymin === "number" &&
+      typeof geometry.ymax === "number"
+    );
+  },
+
   isPolygonal(geometry) {
     const polys = mpoly.get(geometry);