diff --git a/examples/express-mcp-server/src/index.ts b/examples/express-mcp-server/src/index.ts
index e3bf004..afa6ff0 100644
--- a/examples/express-mcp-server/src/index.ts
+++ b/examples/express-mcp-server/src/index.ts
@@ -11,6 +11,7 @@ const port = process.env.PORT || 3000;
 
 const mcpAuthServer = new McpAuthServer({
   baseUrl: process.env.BASE_URL as string,
+  issuer: process.env.ISSUER as string,
 });
 
 app.use(express.json());
diff --git a/examples/express-mcp-vet-ai-assist-app/src/index.ts b/examples/express-mcp-vet-ai-assist-app/src/index.ts
index 9f04c18..4b3c313 100644
--- a/examples/express-mcp-vet-ai-assist-app/src/index.ts
+++ b/examples/express-mcp-vet-ai-assist-app/src/index.ts
@@ -31,6 +31,7 @@ const app: Express = express();
 
 const mcpAuthServer: McpAuthServer = new McpAuthServer({
   baseUrl: process.env.BASE_URL as string,
+  issuer: process.env.ISSUER as string,
 });
 
 app.use(express.json());
diff --git a/packages/mcp-express/README.md b/packages/mcp-express/README.md
index 8f5a759..6e5a1f2 100644
--- a/packages/mcp-express/README.md
+++ b/packages/mcp-express/README.md
@@ -45,6 +45,7 @@ const app = express();
 // Initialize McpAuthServer with baseUrl
 const mcpAuthServer = new McpAuthServer({
   baseUrl: process.env.BASE_URL as string,
+  issuer: process.env.ISSUER as string
 });
 
 app.use(express.json());
@@ -65,7 +66,10 @@ Creates a new instance of the MCP authentication server with the given configura
 ```typescript
 import {McpAuthServer} from '@asgardeo/mcp-express';
 
-const mcpAuthServer = new McpAuthServer({baseUrl: 'https://auth.example.com'});
+const mcpAuthServer = new McpAuthServer({
+  baseUrl: 'https://auth.example.com',
+  issuer: 'https://auth.example.com/oauth2/token'
+});
 ```
 
 #### mcpAuthServer.router()
@@ -95,6 +99,8 @@ The server can be configured with the following option:
 interface McpAuthServerOptions {
   /** Base URL of the authorization server */
   baseUrl: string;
+  /** Issuer of the authorization server */
+  issuer: string;
 }
 ```
 
@@ -119,6 +125,7 @@ const app: Express = express();
 // Initialize McpAuthServer
 const mcpAuthServer = new McpAuthServer({
   baseUrl: process.env.BASE_URL as string,
+  issuer: process.env.ISSUER as string,
 });
 
 app.use(express.json());
diff --git a/packages/mcp-express/src/middlewares/bearerAuthMiddleware.ts b/packages/mcp-express/src/middlewares/bearerAuthMiddleware.ts
index 8d11238..77e3351 100644
--- a/packages/mcp-express/src/middlewares/bearerAuthMiddleware.ts
+++ b/packages/mcp-express/src/middlewares/bearerAuthMiddleware.ts
@@ -60,7 +60,7 @@ export default function bearerAuthMiddleware(options: McpAuthOptions) {
       options: {
         audience: options?.audience,
         clockTolerance: 60,
-        issuer: `${issuerBase}/oauth2/token`,
+        issuer: `${options.issuer}`,
       },
     };
 
diff --git a/packages/mcp-express/src/routes/auth.ts b/packages/mcp-express/src/routes/auth.ts
index ebd5714..dd411e6 100644
--- a/packages/mcp-express/src/routes/auth.ts
+++ b/packages/mcp-express/src/routes/auth.ts
@@ -23,7 +23,7 @@ import {getProtectedResourceMetadata} from '../controllers/protected-resource';
 
 export default function AuthRouter(options: McpAuthOptions): express.Router {
   const router: express.Router = express.Router();
-  const {baseUrl} = options;
+  const {baseUrl, issuer} = options;
   if (!baseUrl) {
     throw new Error('baseUrl must be provided');
   }
@@ -31,7 +31,7 @@ export default function AuthRouter(options: McpAuthOptions): express.Router {
   router.use(
     PROTECTED_RESOURCE_URL,
     getProtectedResourceMetadata({
-      authorizationServers: [baseUrl],
+      authorizationServers: [issuer],
       resource: 'https://api.example.com',
     }),
   );
diff --git a/packages/mcp-node/src/models/mcp-auth.ts b/packages/mcp-node/src/models/mcp-auth.ts
index 91db5b4..064fd18 100644
--- a/packages/mcp-node/src/models/mcp-auth.ts
+++ b/packages/mcp-node/src/models/mcp-auth.ts
@@ -19,4 +19,5 @@
 export interface McpAuthOptions {
   audience?: string;
   baseUrl: string;
+  issuer: string;
 }