diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml
index fabe54421..93ecef1c3 100644
--- a/.github/workflows/gradle.yml
+++ b/.github/workflows/gradle.yml
@@ -17,12 +17,12 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    - name: Set up JDK 11
+    - name: Set up JDK 17
       uses: actions/setup-java@v2
       with:
         distribution: zulu
-        java-version: '11'
-    - uses: actions/cache@v2
+        java-version: '17'
+    - uses: actions/cache@v4
       with:
         path: |
           ~/.gradle/caches
diff --git a/README.md b/README.md
index c747c5757..16f3c29bb 100644
--- a/README.md
+++ b/README.md
@@ -44,7 +44,7 @@ It uses a ~~H2 in-memory database~~ sqlite database (for easy local test without
 
 # Getting started
 
-You'll need Java 11 installed.
+You'll need Java 17 installed.
 
     ./gradlew bootRun
 
diff --git a/build.gradle b/build.gradle
index da384dc69..87e6016ef 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3,12 +3,12 @@ plugins {
     id 'io.spring.dependency-management' version '1.0.11.RELEASE'
     id 'java'
     id "com.netflix.dgs.codegen" version "5.0.6"
-    id "com.diffplug.spotless" version "6.2.1"
+    id "com.diffplug.spotless" version "6.13.0"
 }
 
 version = '0.0.1-SNAPSHOT'
-sourceCompatibility = '11'
-targetCompatibility = '11'
+sourceCompatibility = '17'
+targetCompatibility = '17'
 
 spotless {
     java {
diff --git a/src/test/java/io/spring/infrastructure/service/DefaultJwtServiceTest.java b/src/test/java/io/spring/infrastructure/service/DefaultJwtServiceTest.java
index 12929118a..b2261705e 100644
--- a/src/test/java/io/spring/infrastructure/service/DefaultJwtServiceTest.java
+++ b/src/test/java/io/spring/infrastructure/service/DefaultJwtServiceTest.java
@@ -13,7 +13,8 @@ public class DefaultJwtServiceTest {
 
   @BeforeEach
   public void setUp() {
-    jwtService = new DefaultJwtService("123123123123123123123123123123123123123123123123123123123123", 3600);
+    jwtService =
+        new DefaultJwtService("123123123123123123123123123123123123123123123123123123123123", 3600);
   }
 
   @Test