diff --git a/.readthedocs.yml b/.readthedocs.yml
index ab35df1..5ecf1c9 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -6,6 +6,12 @@ build:
   os: ubuntu-22.04
   tools:
     python: "3.11"
+  apt_packages:
+    - graphviz
+    - libenchant-2-2
+    - gcc
+    - libcups2-dev
+    - python3-dev
 sphinx:
   configuration: doc/conf.py
 submodules: