We use the JSON library Jackson 2.3.3, but the latest version is 2.7.0
Can we assume Semantic Versioning ? If so we should be fine.
Also I believe the json-ld library used by Jena for read/write of JSON-LD depends on Jackson.
Generally I think the unit tests should uncover any issues, but it's worth also checking the command line launcher after upgrading to see it also works fine within OSGi.