diff --git a/readthedocs.yml b/readthedocs.yml
index 6ccd5f0..fa0f496 100644
--- a/readthedocs.yml
+++ b/readthedocs.yml
@@ -35,5 +35,4 @@ python:
    - requirements: docs/requirements.txt
 
 submodules:
-  include:
-    - charsiu
+  include: all