ditto me in with the others.
The tempo which you feel is "too slow" is likely
"just right" for comprehension.
Saying something more quickly doesn't make it interesting.
If you feel you're being "boring" think about other ways to involve your audience. Ask them questions. Use visual aids, props...anything to drive home your point.
But speaking faster? No way! Be grateful that you have a
natural slow tempo. It's much harder (and more important) to slow down!