diff --git a/conforming/src/main/docker/Dockerfile b/conforming/src/main/docker/Dockerfile
index a0386c7c..5976fad0 100644
--- a/conforming/src/main/docker/Dockerfile
+++ b/conforming/src/main/docker/Dockerfile
@@ -15,7 +15,7 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
-FROM eclipse-temurin:17-jre-alpine
+FROM eclipse-temurin:21-jre-alpine
 ARG JAR
 ARG LIB