diff --git a/build.gradle b/build.gradle
index e87b1cf..80284e8 100644
--- a/build.gradle
+++ b/build.gradle
@@ -7,9 +7,12 @@ plugins {
 apply plugin: 'io.spring.dependency-management'
 
 group = 'de.jottyfan'
-version = '0.1.4'
-sourceCompatibility = 17
-targetCompatibility = 17
+version = '0.1.5'
+
+java {
+  sourceCompatibility = 21
+  targetCompatibility = 21
+}
 
 repositories {
 	mavenCentral()
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index e382118..5dc98db 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.12.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.3.0-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists