diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index e435021..3e425aa 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -7,6 +7,9 @@ build:
   os: ubuntu-22.04
   tools:
     python: "3"
+  apt_packages:
+    # App lifecycle graph
+    - graphviz
   jobs:
     pre_build:
       # Ensure appregistry is generated