Librarianship as a profession in America is 88% white, according to the Diversity Counts survey conducted by the American Library Association in 2009 (ALA, 2012). The United States' White and not Hispanic/Latinx population is 60.7% according to 2017 Census estimates (United States Census Bureau). The fundamental unfairness of this power dynamic within my profession, one that prides itself on its values of open access to information and reducing barriers to opportunity, illustrates the structural power of racism. Those responsible for supervising employees and policy decisions within libraries have a vital opportunity to alter this racial disparity through an awareness of barriers faced by persons of color in our country and a determination to make structural change in how the library recruits and retains employees of color. To that end, I ask, does an online 4-week training on antiracism change the racial attitudes of library administrators responsible for supervisory and policy decisions? Framing the course around Ibram X. Kendi's recent book How to Be an Antiracist, and designing it around the concept of adaptive leadership per Heifetz, the study will measure change in attitudes through pre- and post-course assessments (the Implicit Association Test and the Symbolic Racism Scale) alongside content analysis of the discussion posts within the course. Results will be analyzed through the lens of Critical Race Theory. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]