diff --git a/lib/util.js b/lib/util.js
index 5300fa5..8dc625e 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -70,22 +70,15 @@ class Util {
   /**
    * Serialize a series of asynchronous calls to a function
    * over a list of objects
-   * ref: http://www.joezimjs.com/javascript/patterns-asynchronous-programming-promises/
    */
-  static seriesCall(list, fn) {
+  static async seriesCall(list, fn) {
     const results = []
 
-    return list.reduce((memo, item) => {
-        return memo.then(() => {
-          return fn(item)
-        }).then(result => {
-          results.push(result)
-        })
-      },
-      Promise.resolve()
-    ).then(function() {
-      return results
-    })
+    for (const item of list) {
+      results.push(await fn(item));
+    }
+
+    return results;
   }
 
   /**