diff --git a/Dockerfile b/Dockerfile
index 7c9974a..23909fe 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Use Eclipse Temurin's JRE Alpine as base image (smaller than openjdk:slim)
-FROM eclipse-temurin:17-jre-alpine
+FROM eclipse-temurin:21-jre-alpine
 
 # Add curl for healthchecks and bash for scripts
 RUN apk add --no-cache curl bash
diff --git a/Dockerfile.example b/Dockerfile.example
index de4f7df..63f3335 100644
--- a/Dockerfile.example
+++ b/Dockerfile.example
@@ -1,4 +1,4 @@
-FROM eclipse-temurin:17-jdk-alpine as build
+FROM eclipse-temurin:21-jdk-alpine as build
 WORKDIR /workspace/app
 
 # Copy maven executable to the image
@@ -19,7 +19,7 @@ RUN ./mvnw package -DskipTests
 RUN mkdir -p target/dependency && (cd target/dependency; jar -xf ../*.jar)
 
 # Runtime stage
-FROM eclipse-temurin:17-jre-alpine
+FROM eclipse-temurin:21-jre-alpine
 VOLUME /tmp
 VOLUME /logs