diff --git a/readthedocs.yml b/readthedocs.yml
index 3c5b418..ed1d756 100644
--- a/readthedocs.yml
+++ b/readthedocs.yml
@@ -10,6 +10,9 @@ build:
   os: ubuntu-22.04
   tools:
     python: "3.11"
+  jobs:
+    post_create_environment:
+      - python -m pip install sphinx_rtd_theme
 
 # Build documentation in the docs/ directory with Sphinx
 sphinx: