diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 94e4bd9..efba60d 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -9,6 +9,9 @@ build:
   os: ubuntu-22.04
   tools:
     python: "3.8"
+  jobs:
+    post_create_environment:
+      - python -m pip install sphinx_rtd_theme
 
 sphinx:
    configuration: docs/source/conf.py