Despite the benefits of peer review, there are still challenges that need to be addressed to make it more effective for L2 students. With the development of technology, computer-mediated peer review has captured increasing attention from L2 writing researchers and instructors. While Turnitin is known for its use in detecting plagiarism, its newly developed module, PeerMark, aims to facilitate peer review. In this article, we share our experience of using Turnitin for peer review in an ESL academic writing course and discuss its advantages, its limitations, and how different features of PeerMark may be used to address some of the challenges identified in previous research on peer review in the L2 writing classroom. Throughout a semester, the students were required to complete three peer review tasks through Turnitin. Based on the instructor's experience and the students' reports, we found that Turnitin could help shift students' attention from local to global issues in writing, scaffold students in their effort to provide more helpful comments and to make connections between specific suggestions and holistic advice for writing, and facilitate classroom management during peer review.