diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 05333ca..2cf4b33 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -7,5 +7,8 @@ build:
   tools:
     python: "3.12"
 
+python:
+  install:
+    - ["sphinx-rtd-theme"]
 sphinx:
   configuration: docs/conf.py