# Managing UCUM Versions

ucumate currently supports two UCUM versions: 2.1 and 2.2. The default version is 2.2 but you can change that via the properties.

# inside ucumate.properties
ucumate.ucumVersion=2.2

ConfigurationRegistry.initialize(Configuration.builder().withUCUMVersion("2.2").build());

You can also specify the desired version on a per-service basis. Explicitly providing a version will override the version specified in the properties.

UCUMService defaultService = new UCUMService(); // uses what is in the `ucumate.ucumVersion` property
UCUMService service2_1 = new UCUMService("2.1");
UCUMService service2_2 = new UCUMService("2.2");