The package has a debian/watch file, but the last attempt
to use it for checking for newer upstream versions failed with
an error:
In debian/watch no matching files for watch line http://www.oracle.com/technetwork/products/berkeleydb/downloads/index-082944.html (?:.*/|)db-(5\.3[\-\._]?\d\S*)\.(?:tar\.xz|txz|tar\.bz2|tbz2|tar\.gz|tgz)