diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 1c545dc6..04882a49 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -10,6 +10,8 @@ build:
   os: ubuntu-22.04
   tools:
     python: "3.12"
+  apt_packages:
+    - libmemcached-dev
 
 # Build documentation in the docs/ directory with Sphinx
 sphinx: