diff --git a/Dockerfile b/Dockerfile
index d897adc..3d72715 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -11,7 +11,7 @@ COPY frontend/ ./
 RUN npm run build
 
 
-FROM maven:3.9.11-eclipse-temurin-17 AS backend-build
+FROM maven:3.9.11-eclipse-temurin-21 AS backend-build
 WORKDIR /build/backend
 
 COPY backend/pom.xml ./
@@ -22,7 +22,7 @@ COPY --from=frontend-build /build/frontend/dist ./src/main/resources/static
 RUN mvn -B -q -DskipTests package
 
 
-FROM eclipse-temurin:17-jre-alpine AS runtime
+FROM eclipse-temurin:21-jre-alpine AS runtime
 WORKDIR /app
 
 RUN addgroup -S spring && adduser -S spring -G spring
diff --git a/backend/pom.xml b/backend/pom.xml
index 65efa8e..36dd5be 100644
--- a/backend/pom.xml
+++ b/backend/pom.xml
@@ -17,7 +17,7 @@
     <description>MUH application backend</description>
 
     <properties>
-        <java.version>17</java.version>
+        <java.version>21</java.version>
     </properties>
 
     <dependencies>