diff --git a/i-spring-auto-configure/build.gradle b/i-spring-auto-configure/build.gradle
index 828428d..022978f 100644
--- a/i-spring-auto-configure/build.gradle
+++ b/i-spring-auto-configure/build.gradle
@@ -3,6 +3,14 @@ plugins {
 }
 apply plugin: 'me.champeau.mrjar'
 
+configurations {
+    java21CompileClasspath { extendsFrom using }
+    java21RuntimeClasspath { extendsFrom using }
+    java21AnnotationProcessor { extendsFrom using }
+    java21TestCompileClasspath { extendsFrom using }
+    java21TestRuntimeClasspath { extendsFrom using }
+    java21TestAnnotationProcessor { extendsFrom using }
+}
 
 dependencies {
     compileOnly 'org.springframework.boot:spring-boot-autoconfigure'
@@ -55,4 +63,4 @@ compileJava21Java {
 //    into('META-INF/versions/21') {
 //        from compileJava21Java.destinationDirectory
 //    }
-//}
\ No newline at end of file
+//}