Spring Dynamic Modules 1.0 supports JDK level 1.4 and above and OSGi R4 and above. Bundles deployed for use with Spring Dynamic Modules should specify "Bundle-ManifestVersion: 2" in their manifest (OSGi R4). We test against Equinox 3.2.2, Felix 1.0.3, and Knopflerfish 2.0.4 as part of our continuous integration process.