diff --git a/lib/index.js b/lib/index.js
index cb5bed8..a81aa46 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -16,7 +16,7 @@ function getDistFullPath(filename) {
 
 async function getDatasetSiteTemplate(singleFileMode) {
   // Get pre-rendered template from ./dist/
-  return await fs.readFile(getDistFullPath(getDatasetSiteTemplateFilename(singleFileMode)), { encoding:'utf8' });
+  return await fs.promises.readFile(getDistFullPath(getDatasetSiteTemplateFilename(singleFileMode)), { encoding:'utf8' });
 }
 
 function getDatasetSiteTemplateSync(singleFileMode) {