Bouncy Castle library should be updated to 1.66 version.
Merged PR provided by Neustradamus https://github.com/igniterealtime/Spark/pull/482
Actually, there is already 1.66, so bumping to that version https://github.com/igniterealtime/Spark/commit/6b89d28ef7afc9aab5f1d489e1f9ac6e0d363177