diff --git a/README.md b/README.md
index 4dc9064..26d364d 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@
 
 Copy paste following markdown into your markdown content, and that's it. Easy Easy Tammam Tammam!
 
-Change the `?userID=` value to your StackOverflow's userID.
+Change the `?userID=` value to your StackExchange userID (for the relevant site).
 
 ```md
 [![Omid Nikrah StackOverflow](https://github-readme-stackoverflow.vercel.app/?userID=6558042)](https://stackoverflow.com/users/6558042/omid-nikrah)
@@ -28,21 +28,38 @@ If you want to have a compact layout, just you need to add `layout=compact` as a
 [![Omid Nikrah StackOverflow](https://github-readme-stackoverflow.vercel.app/?userID=6558042&layout=compact)](https://stackoverflow.com/users/6558042/omid-nikrah)
 [![Omid Nikrah StackOverflow](https://github-readme-stackoverflow.vercel.app/?userID=6558042&layout=compact&theme=dark)](https://stackoverflow.com/users/6558042/omid-nikrah)
 
+#### Other Sites
+
+You can use other StackExchange sites instead of StackOverflow too, such as Biology StackExchange or AskUbuntu. Just add `site={SITE}` as a parameter. Examples:
+- `site=biology`
+- `site=askubuntu`
+- `site=money`
+
+The site name provided as a parameter must be the same as the domain for that site. For example, Personal Finance and Money StackExchange has a URL of `money.stackexchange.com`, so `site=money` must be provided.
+
+> **Warning**
+> Different sites have different userIDs. So your StackOverflow userID will not be the same as your Biology StackExchange userID.
+
+[![Zohan Subhash Biology.SE](https://github-readme-stackoverflow.zohan.tech/?userID=68669&site=biology)](https://biology.stackexchange.com/users/68669/zo-bro-23)
+[![Zohan Subhash Biology.SE](https://github-readme-stackoverflow.zohan.tech/?userID=68669&theme=dark&site=biology)](https://biology.stackexchange.com/users/68669/zo-bro-23)
 
 <br>
 
 ## Options
 |    Name    |           Description           |        Default value       |
 | ---------- | ------------------------------- | -------------------------- |
-| userID     | Your StackOverflow userID            | REQUIRED                |
+| userID     | Your StackExchange userID            | REQUIRED                |
 | theme      | Theme of the StackOverflow card (light or dark)      | light     |
-| layout     | Layout of the StackOverflow card (compact or default) | default |    
+| layout     | Layout of the StackOverflow card (compact or default) | default |
+| site       | Which StackExchange site to get the data from | stackoverflow |
 
 <br>
 
 ## Contributors
 - [Omid Nikrah](https://github.com/omidnikrah)
 - [Soroush Chehresa](https://github.com/soroushchehresa)
+- [Zohan Subhash](https://github.com/Zo-Bro-23)
+- [Jéf Bueno](https://github.com/jfbueno)
 
 <br>
 
diff --git a/index.js b/index.js
index 60a46b7..425b4fb 100644
--- a/index.js
+++ b/index.js
@@ -5,7 +5,7 @@ const StackOverflowCard = require('./src/StackOverflowCard');
 
 http.createServer(async (req, res) => {
   const reqURL = url.parse(req.url, true);
-  const { userID, theme = 'light', layout = 'default' } = reqURL.query;
+  const { userID, theme = 'light', layout = 'default', site = 'stackoverflow' } = reqURL.query;
 
   if (!userID) {
     res.write(JSON.stringify({error: 'Add your StackOverflow userID as query string'}));
@@ -13,11 +13,11 @@ http.createServer(async (req, res) => {
     return;
   }
 
-  const responseArticles = await fetch(`https://api.stackexchange.com/2.2/users/${userID}?site=stackoverflow&filter=!--1nZv)deGu1`);
+  const responseArticles = await fetch(`https://api.stackexchange.com/2.2/users/${userID}?site=${site}&filter=!--1nZv)deGu1`);
   const json = await responseArticles.json();
 
   if (!json.items || json.items.length === 0) {
-    res.write(JSON.stringify({error: 'Your stackoverflow userID is not correct'}));
+    res.write(JSON.stringify({error: 'Your userID/site is not valid'}));
     res.end();
     return;
   }
@@ -33,4 +33,4 @@ http.createServer(async (req, res) => {
   res.end();
 }).listen(process.env.PORT || 3000, function(){
  console.log("server start at port 3000");
-});
\ No newline at end of file
+});
diff --git a/vercel.json b/vercel.json
index 33d8629..d75206a 100644
--- a/vercel.json
+++ b/vercel.json
@@ -1,6 +1,13 @@
 {
+  "version": 2,
   "builds": [{
     "src": "index.js",
-    "use": "@now/node-server"
-  }]
+    "use": "@vercel/node"
+  }],
+  "routes": [
+    {
+      "src": "/(.*)",
+      "dest": "index.js"
+    }
+  ]
 }