diff --git a/authorization_code/app.js b/authorization_code/app.js
index 9b8a6b55..3996e24e 100644
--- a/authorization_code/app.js
+++ b/authorization_code/app.js
@@ -81,7 +81,7 @@ app.get('/callback', function(req, res) {
         grant_type: 'authorization_code'
       },
       headers: {
-        'Authorization': 'Basic ' + (new Buffer(client_id + ':' + client_secret).toString('base64'))
+        'Authorization': 'Basic ' + (Buffer.from(client_id + ':' + client_secret).toString('base64'))
       },
       json: true
     };
@@ -125,7 +125,7 @@ app.get('/refresh_token', function(req, res) {
   var refresh_token = req.query.refresh_token;
   var authOptions = {
     url: 'https://accounts.spotify.com/api/token',
-    headers: { 'Authorization': 'Basic ' + (new Buffer(client_id + ':' + client_secret).toString('base64')) },
+    headers: { 'Authorization': 'Basic ' + (Buffer.from(client_id + ':' + client_secret).toString('base64')) },
     form: {
       grant_type: 'refresh_token',
       refresh_token: refresh_token
diff --git a/client_credentials/app.js b/client_credentials/app.js
index f6a799af..cbb1bf64 100644
--- a/client_credentials/app.js
+++ b/client_credentials/app.js
@@ -16,7 +16,7 @@ var client_secret = 'CLIENT_SECRET'; // Your secret
 var authOptions = {
   url: 'https://accounts.spotify.com/api/token',
   headers: {
-    'Authorization': 'Basic ' + (new Buffer(client_id + ':' + client_secret).toString('base64'))
+    'Authorization': 'Basic ' + (Buffer.from(client_id + ':' + client_secret).toString('base64'))
   },
   form: {
     grant_type: 'client_credentials'