At startup I see:
Effective nREPL dependency versions:
nrepl: 1.5.2 (configured in settings)
cider-nrepl: 0.58.0 (Calva defaults)
cider/piggieback: 0.6.1 (Calva defaults)
Latest available nREPL dependency versions found on Clojars:
nrepl: 1.5.1
cider-nrepl: 0.58.0
cider/piggieback: 0.6.1
Note that Calva thinks nrepl 1.5.1 is the latest on Clojars, but 1.5.2 is available and I have that configured in settings.