diff --git a/dev-docs/bidders/markapp.md b/dev-docs/bidders/markapp.md
index 3e427f8119..7793677efb 100644
--- a/dev-docs/bidders/markapp.md
+++ b/dev-docs/bidders/markapp.md
@@ -26,6 +26,7 @@ multiformat_supported: will-bid-on-any
 |---------------|----------|---------------------------------|-------------------------------------|-----------|
 | `seat`        | required | Seat value                      | `'9Q20EdGxzgWdfPYShScl'`            | `string`  |
 | `token`       | required | Token                           | `'eKmw6alpP3zWQhRCe3flOpz0wpuwRFjW'` | `string`  |
+| `region`      | optional | Region                          | `apac`                              | `string`  |
 | `iabCat`      | optional | Array of IAB content categories that describe the content producer | `['IAB1-1', 'IAB3-1', 'IAB4-3']` | `Array(String)` |
 | `minBidfloor`  | optional | Minimal CPM value               | `0.03`                              | `float`    |
 | `pos`         | optional | The position of the placement on the page, see Open RTB spec v2.5.  | `4` | `number`  |