diff --git a/jvmti-access/build.gradle.kts b/jvmti-access/build.gradle.kts
index 2797865b..ede92e9a 100644
--- a/jvmti-access/build.gradle.kts
+++ b/jvmti-access/build.gradle.kts
@@ -106,7 +106,7 @@ nativeTargets.forEach {
     inputDir.set(file("jni-build"))
   }
 
-  val artifactCompileTask = task("compileJni$taskSuffix", DockerRun::class) {
+   val artifactCompileTask = tasks.register<DockerRun>("compileJni$taskSuffix") {
     dependsOn(createImageTask)
     //compileJava generates the JNI-headers from native methods
     dependsOn(tasks.compileJava)
diff --git a/smoke-tests/test-app/build.gradle.kts b/smoke-tests/test-app/build.gradle.kts
index b98a1c0b..b5c07d4c 100644
--- a/smoke-tests/test-app/build.gradle.kts
+++ b/smoke-tests/test-app/build.gradle.kts
@@ -14,7 +14,7 @@ dependencies {
   // - http endpoint, which is easy to call remotely
   // - implement a server, which is not a single invocation only like a CLI app
   // - multiple endpoints are possible, which allows multiple test scenarios
-  val springBootVersion = "2.7.18";
+  val springBootVersion = "4.0.1";
   testImplementation("org.springframework.boot:spring-boot-starter-test:${springBootVersion}")
   implementation("org.springframework.boot:spring-boot-starter-web:${springBootVersion}")