diff --git a/.readthedocs.yml b/.readthedocs.yml
index 81c63c7..9067291 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -20,6 +20,8 @@ build:
   os: ubuntu-22.04
   tools:
     python: "3.9"
+  apt_packages:
+    - libvips-dev
 
 python:
   install: