apply plugin: 'java-library' apply plugin: 'kotlin' sourceCompatibility = 1.8 compileKotlin { kotlinOptions.jvmTarget = "1.8" } compileTestKotlin { kotlinOptions.jvmTarget = "1.8" } dependencies { api project(':BankFinder') // why can't Gradle find BankFinder? If the same applies to you, publish BankFinder to Maven Local first and uncomment this line: // api "net.dankito.banking:BankFinder-jvm:$version" implementation 'org.docx4j:docx4j-JAXB-ReferenceImpl:8.1.3' testImplementation "junit:junit:$junitVersion" testImplementation "org.assertj:assertj-core:$assertJVersion" testImplementation "ch.qos.logback:logback-core:$logbackVersion" testImplementation "ch.qos.logback:logback-classic:$logbackVersion" }