diff --git a/en/SUMMARY.md b/en/SUMMARY.md
index ff3782f..722f8e0 100644
--- a/en/SUMMARY.md
+++ b/en/SUMMARY.md
@@ -27,4 +27,5 @@
 * [PX4 User Guide](https://docs.px4.io/en/)
 * [QGroundControl User Guide](https://docs.qgroundcontrol.com/en/)
 * [QGroundControl Developer Guide](https://dev.qgroundcontrol.com/en/)
-* [MAVLink Developer Guide](https://mavlink.io/en/)
\ No newline at end of file
+* [MAVLink Guide](https://mavlink.io/en/)
+* [Dronecode SDK](https://sdk.dronecode.org/en/)