Open Source communities operate on a set of values that include a commitment to inclusion and diversity. The idea that the tech ecosystem at large is faced with the challenges of diversity and inclusion is not a myth. To some degree, everyone has implicit biases and beliefs about various social and identity groups. Implicit biases are unconscious attitudes or stereotypes that affect how we think, act, and make decisions. Studies have shown that implicit bias is the main cause of most of the problems caused by diversity and inclusion. As users, maintainers, and contributors of Open Source software, we may have encountered different marginalised groups that have shared their encounters of bias in Open Source communities. Majority of people are unaware of this bias and how it affects them as individuals or even as the victims. I'll go over what diversity and inclusion are in this session and why they're important in open source. Challenges faced by underrepresented groups in open source communities as a result of bias. What implicit bias is and how to spot it. Highlights of different forms of implicit bias, how to be more aware of this biases as a community and how it can be improved.