diff --git a/authorization/authorization_code/README.md b/authorization/authorization_code/README.md
index 00f21d79..8000a3ca 100644
--- a/authorization/authorization_code/README.md
+++ b/authorization/authorization_code/README.md
@@ -15,7 +15,7 @@ Install the app dependencies running:
 
 You will need to register your app and get your own credentials from the [Spotify for Developers Dashboard](https://developer.spotify.com/dashboard).
 
-- Create a new app in the dashboard and add `http://localhost:8888/callback` to the app's redirect URL list.
+- Create a new app in the dashboard and add `https://127.0.0.1:8888/callback` to the app's redirect URL list.
 - Once you have created your app, update the `client_id`, `redirect_uri`, and `client_secret` in the `app.js` file with the credentials obtained from the app settings in the dashboard.
 
 ## Running the example
@@ -24,4 +24,4 @@ From a console shell:
 
     $ npm start
 
-Then, open `http://localhost:8888` in a browser.
+Then, open `https://127.0.0.1:8888/callback` in a browser.
diff --git a/authorization/authorization_code/app.js b/authorization/authorization_code/app.js
index ebd40d1f..a08a2c34 100644
--- a/authorization/authorization_code/app.js
+++ b/authorization/authorization_code/app.js
@@ -16,7 +16,7 @@ var cookieParser = require('cookie-parser');
 
 var client_id = 'yourClientIDGoesHere'; // your clientId
 var client_secret = 'YourSecretIDGoesHere'; // Your secret
-var redirect_uri = 'http://localhost:8888/callback'; // Your redirect uri
+var redirect_uri = 'https://127.0.0.1:8888/callback'; // Your redirect uri
 
 
 const generateRandomString = (length) => {
diff --git a/authorization/authorization_code_pkce/README.md b/authorization/authorization_code_pkce/README.md
index 744ce7ee..8f95b4a1 100644
--- a/authorization/authorization_code_pkce/README.md
+++ b/authorization/authorization_code_pkce/README.md
@@ -7,7 +7,7 @@ to grant permissions to the app.
 
 You will need to register your app and get your own credentials from the [Spotify for Developers Dashboard](https://developer.spotify.com/dashboard).
 
-- Create a new app in the dashboard and add `http://localhost:8080` to the app's redirect URL list.
+- Create a new app in the dashboard and add `https://127.0.0.1:8080` to the app's redirect URL list.
 - Once you have created your app, update the `client_id` and `redirect_uri` in the `public/app.js` file with the values obtained from the app settings in the dashboard.
 
 ## Running the example
@@ -16,4 +16,4 @@ From a console shell:
 
     $ npm start
 
-Then, open `http://localhost:8080` in a browser.
+Then, open `https://127.0.0.1:8080` in a browser.
diff --git a/authorization/authorization_code_pkce/public/app.js b/authorization/authorization_code_pkce/public/app.js
index ca3318f7..ecb3e083 100644
--- a/authorization/authorization_code_pkce/public/app.js
+++ b/authorization/authorization_code_pkce/public/app.js
@@ -8,7 +8,7 @@
  */
 
 const clientId = 'yourClientIDGoesHere'; // your clientId
-const redirectUrl = 'eg:http://localhost:8080';        // your redirect URL - must be localhost URL and/or HTTPS
+const redirectUrl = 'eg:https://127.0.0.1:8080';        // your redirect URL - must be localhost URL and/or HTTPS
 
 const authorizationEndpoint = "https://accounts.spotify.com/authorize";
 const tokenEndpoint = "https://accounts.spotify.com/api/token";
diff --git a/authorization/client_credentials/README.md b/authorization/client_credentials/README.md
index 4d43a25c..e79ba0e1 100644
--- a/authorization/client_credentials/README.md
+++ b/authorization/client_credentials/README.md
@@ -11,7 +11,7 @@ This example runs on Node.js. On [its website](http://www.nodejs.org/download/)
 
 You will need to register your app and get your own credentials from the [Spotify for Developers Dashboard](https://developer.spotify.com/dashboard).
 
-- Create a new app in the dashboard and add `http://localhost:8888/callback` to the app's redirect URL list.
+- Create a new app in the dashboard and add `https://127.0.0.1:8888/callback` to the app's redirect URL list.
 - Once you have created your app, update the `client_id` and `client_secret` in the `app.js` file with the credentials obtained from the app settings in the dashboard.
 
 ## Running the example
diff --git a/authorization/implicit_grant/README.md b/authorization/implicit_grant/README.md
index ae706132..7bc5026a 100644
--- a/authorization/implicit_grant/README.md
+++ b/authorization/implicit_grant/README.md
@@ -17,7 +17,7 @@ Install the app dependencies running:
 
 You will need to register your app and get your own credentials from the [Spotify for Developers Dashboard](https://developer.spotify.com/dashboard).
 
-- Create a new app in the dashboard and add `http://localhost:8080` to the app's redirect URL list.
+- Create a new app in the dashboard and add `https://127.0.0.1:8080` to the app's redirect URL list.
 - Once you have created your app, update the `client_id` and `redirect_uri` in the `public/index.html` file with the values obtained from the app settings in the dashboard.
 
 ## Running the example
@@ -26,4 +26,4 @@ From a console shell:
 
     $ npm start
 
-Then, open `http://localhost:8080` in a browser.
+Then, open `https://127.0.0.1:8080` in a browser.
diff --git a/get_user_profile/README.md b/get_user_profile/README.md
index a1183eb7..a06d729b 100644
--- a/get_user_profile/README.md
+++ b/get_user_profile/README.md
@@ -12,7 +12,7 @@ To run this demo you will need:
 
 ## Usage
 
-Create an app in your [Spotify Developer Dashboard](https://developer.spotify.com/dashboard/), set the redirect URI to ` http://localhost:5173/callback` and `http://localhost:5173/callback/` and copy your Client ID. 
+Create an app in your [Spotify Developer Dashboard](https://developer.spotify.com/dashboard/), set the redirect URI to ` https://127.0.0.1:5173/callback` and `https://127.0.0.1:5173/callback/` and copy your Client ID. 
 
 Clone the repository, ensure that you are in the `get_user_profile` directory and run:
 
diff --git a/get_user_profile/src/authCodeWithPkce.ts b/get_user_profile/src/authCodeWithPkce.ts
index 52381f77..3ce260df 100644
--- a/get_user_profile/src/authCodeWithPkce.ts
+++ b/get_user_profile/src/authCodeWithPkce.ts
@@ -7,7 +7,7 @@ export async function redirectToAuthCodeFlow(clientId: string) {
     const params = new URLSearchParams();
     params.append("client_id", clientId);
     params.append("response_type", "code");
-    params.append("redirect_uri", "http://localhost:5173/callback");
+	params.append("redirect_uri", "https://127.0.0.1:5173/callback");
     params.append("scope", "user-read-private user-read-email");
     params.append("code_challenge_method", "S256");
     params.append("code_challenge", challenge);
@@ -22,7 +22,7 @@ export async function getAccessToken(clientId: string, code: string) {
     params.append("client_id", clientId);
     params.append("grant_type", "authorization_code");
     params.append("code", code);
-    params.append("redirect_uri", "http://localhost:5173/callback");
+	params.append("redirect_uri", "https://127.0.0.1:5173/callback");
     params.append("code_verifier", verifier!);
 
     const result = await fetch("https://accounts.spotify.com/api/token", {