This paper explores the effect of Global Value Chain (GVC) participation on social upgrading, which is captured by skill upgrading and working condition measures. Based on comprehensive firm-level data from the World Bank Enterprise Survey (WBES), this study provides a dataset of 84,191 firms in 117 developing countries. Using a propensity score matching a difference-in-differences approach and controlling for fixed effects, the results suggest an overall positive significant effect of GVC integration on social upgrading, i.e., skill upgrading and working conditions.