diff --git a/.readthedocs.yml b/.readthedocs.yml
index 569fae4c48..76f779bca7 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -14,4 +14,9 @@ formats:
 python:
   version: 2.7
   install:
-    - requirements: docs/requirements.txt
\ No newline at end of file
+    - requirements: docs/requirements.txt
+
+# We need to list all the submodules included in documenation build by DOxygen
+submodules: 
+  include:
+    - components/mqtt/esp-mqtt
\ No newline at end of file