diff --git a/cs3/gateway/v1beta1/gateway_api.proto b/cs3/gateway/v1beta1/gateway_api.proto
index ef6b7cc7..8585316f 100644
--- a/cs3/gateway/v1beta1/gateway_api.proto
+++ b/cs3/gateway/v1beta1/gateway_api.proto
@@ -376,6 +376,9 @@ message AuthenticateRequest {
   // OPTIONAL.
   // The secret of the client.
   string client_secret = 4;
+  // OPTIONAL.
+  // The scope of the issued token.
+  repeated string token_scope = 5;
 }
 
 message AuthenticateResponse {
diff --git a/docs/index.html b/docs/index.html
index 268ec553..cb42f26b 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -1846,6 +1846,14 @@ <h3 id="cs3.gateway.v1beta1.AuthenticateRequest">AuthenticateRequest</h3>
 The secret of the client. </p></td>
                 </tr>
               
+                <tr>
+                  <td>token_scope</td>
+                  <td><a href="#string">string</a></td>
+                  <td>repeated</td>
+                  <td><p>OPTIONAL.
+The scope of the issued token. </p></td>
+                </tr>
+              
             </tbody>
           </table>