diff --git a/build.gradle b/build.gradle
index ac0ca7b..4f49a7c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3,6 +3,10 @@ plugins {
     id "org.sonarqube" version "4.4.1.3373"
 }
 
+java {
+    sourceCompatibility = '21'
+}
+
 sonar {
     properties {
         property "sonar.projectKey", "antoine-vinot-sonarsource_Scanning_AYyCPVmyMC3uXdxpHdyc"