diff --git a/Dockerfile b/Dockerfile
index c150597..a4b8bcd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM openjdk:8-jdk
+FROM openjdk:21-jdk
 COPY target/*.jar app.jar
 
 ENTRYPOINT ["java", "-jar", \