diff --git a/.build.yml b/.build.yml
index e8ff380..ea14473 100644
--- a/.build.yml
+++ b/.build.yml
@@ -1,6 +1,6 @@
 image: ubuntu/lts
 packages:
-  - openjdk-17-jdk-headless
+  - openjdk-21-jdk-headless
   - rsync
 secrets:
   - 2c7f4f4a-a9c9-47e2-a432-b8a060d01381