diff --git a/.readthedocs.yml b/.readthedocs.yml
index e773382ba..3d93cb5ad 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -1,9 +1,24 @@
 # Copyright 2021-2023 Axel Huebl
 #
-# This file is part of ImpactX.
+# This file is part of ImpactX
 #
 # License: BSD-3-Clause-LBNL
 
-requirements_file: docs/requirements.txt
+version: 2
+
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.11"
+
+sphinx:
+   configuration: docs/source/conf.py
+
+python:
+   install:
+   - requirements: docs/requirements.txt
 
 formats:
+  - htmlzip
+#  - pdf
+#  - epub