ExaDG is a software project written in C++ using state-of-the-art programming techniques. The software targets the numerical solution of partial differential equations (PDE) in the field of computational fluid dynamics (CFD). This code specifies the specific version of the underlying deal.II library hosted on https://github.com/dealii/dealii and ExaDG hosted on https://github.com/exadg/exadg. This release is specifically created to document the version of ExaDG and deal.II used in the particular set of experiments of the paper "A Next-Generation Discontinuous Galerkin Fluid Dynamics Solver with Application to High-Resolution Lung Airflow Simulations" by M. Kronbichler, N. Fehn, P. Munch, M. Bergbauer, K.-R. Wichmann, C. Geitner, M. Allalen, M. Schulz, W.-A. Wall, SC-21, 2021. Please do not cite this as a general source for ExaDG, deal.II, or any of its dependencies. Instead, refer to the ExaDG and deal.II repositories for details. The attached file install.sh includes a script with installation on common Linux-based HPC architectures.