diff --git a/build.gradle b/build.gradle
index 95eb05c..2b110bd 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,13 +1,13 @@
 plugins {
     id 'java'
     id 'idea'
-    id 'org.springframework.boot' version '2.7.18'
-    id 'io.spring.dependency-management' version '1.0.15.RELEASE'
+    id 'org.springframework.boot' version '3.0.13'
+    id 'io.spring.dependency-management' version '1.1.7'
 }
 
 java {
-    sourceCompatibility = JavaVersion.VERSION_1_8
-    targetCompatibility = JavaVersion.VERSION_1_8
+    sourceCompatibility = JavaVersion.VERSION_21
+    targetCompatibility = JavaVersion.VERSION_21
 }
 
 jar {
@@ -20,10 +20,7 @@ repositories {
 }
 
 dependencies {
-    implementation('org.springframework.boot:spring-boot-starter-web') {
-        exclude module: 'spring-boot-starter-tomcat'
-    }
-    implementation 'org.springframework.boot:spring-boot-starter-jetty'
+    implementation 'org.springframework.boot:spring-boot-starter-web'
     implementation 'org.springframework.boot:spring-boot-starter-actuator'
 
     testImplementation 'junit:junit:4.13.2'
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 68e172c..a402f68 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Tue Sep 16 13:45:53 BST 2014
+#Updated for Java 21 compatibility
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-1.11-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-all.zip