The mass of an atomic nucleus reflects a net result of complicated interactions between nucleons composing it. Systematic studies of nuclear masses are decisive to elucidate nuclear structure changes and in turn help us to understand the underlying nuclear forces. Although numerous masses have been measured to date, further measurements are needed to benchmark and improve theory. The nuclei with yet unknown masses lie at the outskirts of the nuclidic chart. They are complicated to produce and are short-lived, which makes their measurements extremely challenging. In this context, storage ring mass spectrometry is one of the promising methods characterized by a very high sensitivity, mass resolving power and speed. Recent developments of the storage ring mass spectrometry are briefly discussed.