diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 82961d4..99c267c 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -9,10 +9,10 @@ build:
   os: ubuntu-22.04
   tools:
     python: "3.9"
+  apt_packages:
+    - doxygen
   jobs:
     pre_build:
-      - sudo apt-get update
-      - sudo apt-get install -y doxygen
       - doxygen Doxyfile
 
 # Build from the docs/ directory with Sphinx