diff --git a/local-docker-compose.yml b/local-docker-compose.yaml
similarity index 100%
rename from local-docker-compose.yml
rename to local-docker-compose.yaml
diff --git a/src/index.js b/src/index.js
index 4e90997..8687bcc 100644
--- a/src/index.js
+++ b/src/index.js
@@ -78,12 +78,15 @@ function saveVehicles() {
 
         return writeHelper.writeToS3(s3Bucket, agencyInfo.id, currentDateTime, vehicles);
       })
-      .catch((err) => {
-        console.log(err);
-      });
   });
 
-  Promise.all(promises);
+  // Do not reject all promises when one of them is rejected, but do output why one (or more) was rejected.
+  Promise.allSettled(promises)
+    .then((results) => results.forEach((result) => {
+        if(result.status == "rejected") {
+            console.log("received a rejected promise with reason:", result.reason)
+        }
+    }));
 }
 
 function storeLocal() {
diff --git a/src/writeHelper.js b/src/writeHelper.js
index a6ae846..a2dfc96 100644
--- a/src/writeHelper.js
+++ b/src/writeHelper.js
@@ -1,8 +1,10 @@
 const AWS = require('aws-sdk');
-const fs = require('fs');
+const s3 = new AWS.S3();
+const { writeFile }  = require('fs/promises');
+
 var zlib = require('zlib');
 
-const s3 = new AWS.S3();
+
 
 function compressData(data) {
   return new Promise((resolve, _) => {
@@ -17,12 +19,11 @@ function writeLocal(agency, currentDateTime, data) {
   const version = "v1";
   const fileName = `/tmp/${agency}_${version}_${currentTimestamp}.json`
 
-  fs.writeFile(fileName, JSON.stringify(data), err => {
-    if (err) {
-      console.error(err);
-    }
-    console.log("wrote", fileName)
-  }); 
+  return writeFile(fileName, JSON.stringify(data))
+    .then((data) => {
+      console.log("wrote", fileName);
+      return data;
+    });
 }
 
 function writeToS3(s3Bucket, agency, currentDateTime, data) {