Nike CEO Mark Parker promised to overhaul the athletic apparel maker’s systems for handling workplace-behavior complaints after reports of improper conduct that spurred a shakeup in the firm’s executive ranks.

Nike didn’t provide further specifics, though Parker said the actions described didn’t reflect its core values of “inclusivity, respect and empowerment” in an internal memo, which was first reported by the Wall Street Journal, then picked up by other news media including an Oregon television reporter who shared it on Twitter.