Gradle maven publish replace default runtime scope with compile scope. See: http://forums.gradle.org/gradle/topics/using_the_maven_publish_plugin_no_dependencies_in_pom_xml

build.gradle

publishing {
    publications {
        mavenJava(MavenPublication) {
            pom.withXml {
                asNode().dependencies.'*'.findAll() {
                    it.scope.text() == 'runtime' && project.configurations.compile.allDependencies.find { dep ->
                        dep.name == it.artifactId.text()
                    }
                }.each() {
                    it.scope*.value = 'compile'
                }
            }
            from components.java
            artifact sourcesJar {
                classifier "sources"
            }
            artifact javadocJar {
                classifier "javadoc"
            }
        }
    }
}