diff --git a/.github/workflows/deploy-docs.yml b/.github/workflows/deploy-docs.yml
index b49e089316a..84d946674b1 100644
--- a/.github/workflows/deploy-docs.yml
+++ b/.github/workflows/deploy-docs.yml
@@ -152,6 +152,7 @@ jobs:
           java-version: |
             11
             17
+            21
 
       - name: Build Java docs
         run: |