<project> ... <build> <!-- To define the plugin version in your parent POM --> <pluginManagement> <plugins> <plugin> <groupId>net.alchim31.maven</groupId> <artifactId>yuicompressor-maven-plugin</artifactId> <version>1.1</version> </plugin> ... </plugins> </pluginManagement> <!-- To use the plugin goals in your POM or parent POM --> <plugins> <plugin> <groupId>net.alchim31.maven</groupId> <artifact