First, realize that change isn't an overnight process - it can take time to make the case for trying something new to your superiors. Second, try to understand (if possible) what motivations your team lead could have for being "stuck in their ways" - this can provide clues on the types of strategies you can use to help persuade them of your perspective.

Instigating a change often requires understanding the context or situation you're in, which is likely beyond the scope of this question. However, a good place to start is by reading Mary Lynn Manns and Linda Rising's book, Fearless Change: Patterns for Introducing New Ideas[1]. It provides a series of change event patterns that you can adopt/adapt for your purposes depending on the situation you find yourself within.

A key takeaway from the book is to keep your skeptics engaged - don't distance them from what you're doing, but also don't let them dissuade you from trying to bring about positive changes. Another is that when you start this process, be prepared for the long haul. It's a lot of two steps forward, three back.

Good luck!

[1] http://www.amazon.ca/Fearless-Change-Patterns-Introducing-Ideas/dp/0201741571