diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 2e4e003c..5640b2bf 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -7,6 +7,8 @@ build:
   os: ubuntu-22.04
   tools:
     python: "3"
+  apt_packages:
+    - default-jre
 
 python:
   install: