diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 3797dc8..82889b5 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -5,9 +5,6 @@
 # Required
 version: 2
 
-formats:
-  - htmlzip
-
 build:
   image: latest
 
@@ -16,5 +13,8 @@
   install:
     - requirements: docs/requirements-docs.txt
 
+submodules:
+   include: all
+
 sphinx:
   configuration: docs/conf.py