Traditional requirements engineering (RE) techniques have difficulties scaling up to settings with thousands up to millions of users of a (software) product. Now that these users can easily interact among themselves and with the development company, they form a large and heterogeneous group that can be denoted as a ‘crowd’. Researchers have identified several issues with applying RE in the new crowd paradigm. Methods and tools are being investigated, but we see the need for more tailored and holistic approaches, focusing on Crowd-Based Requirements Engineering. The International Workshop on Crowd-Based Requirements Engineering (CrowdRE) aims to attract papers with novel and innovative ideas on involving the crowd and collecting, harmonizing, analyzing, and interpreting their user feedback. In this regard, CrowdRE intends to facilitate interactive discussions between scientists and representatives of industry in order to analyze the state of the art and to inspire each other in ways to move forward together.