diff --git a/Dockerfile b/Dockerfile
index 9ab02ebd..1604e7e8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM openjdk:17-jdk-slim as build
+FROM openjdk:21-jdk-slim as build
 
 WORKDIR /kafka-plain-saslserver-2-ad