diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 9138a7f..3a7dcde 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -1,5 +1,9 @@
 version: "2"
 
+formats:
+    - epub
+    - htmlzip
+
 build:
   os: "ubuntu-22.04"
   tools: