diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index f0db1348..b23558fa 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -7,6 +7,7 @@ build:
 
 submodules:
   include: all
+  recursive: true
 
 sphinx:
   configuration: conf.py