diff --git a/lib/postmark-transport.js b/lib/postmark-transport.js
index fce8ae0..49dc5a9 100644
--- a/lib/postmark-transport.js
+++ b/lib/postmark-transport.js
@@ -171,7 +171,7 @@ PostmarkTransport.prototype._parse = function (mails, callback) {
  */
 PostmarkTransport.prototype._parseAttachments = function (attachments, callback) {
   const mailComposer = new MailComposer({
-    attachments: attachments
+    attachments
   });
   const elements = mailComposer.getAttachments().attached;
   const options = {
@@ -221,8 +221,8 @@ PostmarkTransport.prototype._requestFactory = function (method) {
 
       return callback(null, {
         messageId: (originalResults[0] || {}).MessageID,
-        accepted: accepted,
-        rejected: rejected,
+        accepted,
+        rejected,
         originalResults
       });
     });
diff --git a/lib/utils.js b/lib/utils.js
index c37a337..c644e40 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -69,8 +69,8 @@ function callbackPromise(resolve, reject) {
 }
 
 module.exports = {
-  addressFormatter: addressFormatter,
-  addressParser: addressParser,
-  callbackPromise: callbackPromise,
-  headersParser: headersParser
+  addressFormatter,
+  addressParser,
+  callbackPromise,
+  headersParser
 };
diff --git a/package.json b/package.json
index c802ca5..e873d62 100644
--- a/package.json
+++ b/package.json
@@ -68,11 +68,11 @@
     "chai": "^4.3.10",
     "coveralls": "^3.1.1",
     "dirty-chai": "^2.0.1",
-    "eslint": "^7.32.0",
-    "eslint-config-standard": "^16.0.3",
+    "eslint": "^8.56.0",
+    "eslint-config-standard": "^17.1.0",
     "eslint-plugin-import": "^2.29.1",
     "eslint-plugin-node": "^11.1.0",
-    "eslint-plugin-promise": "^4.3.1",
+    "eslint-plugin-promise": "^6.1.1",
     "eslint-plugin-standard": "^4.1.0",
     "husky": "^6.0.0",
     "mocha": "^8.4.0",