diff --git a/Dockerfile b/Dockerfile
index e8bdb102..d05cf3d0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -25,6 +25,7 @@ RUN apt-get update \
         openjdk-8-jre-headless \
         openjdk-11-jre-headless \
         openjdk-17-jre-headless \
+        openjdk-21-jre-headless \
         tzdata \
     && apt-get autoremove \
     && apt-get clean