'Warning when loading pysal library

I dowloaded Anaconda e installed Pysal through the nqvigator. It seems to work properly, but when loading it, the following warning appears:

UserWarning: The `dill` module is required to use the sqlite backend fully.
  from .sqlite import head_to_sql, start_sql

I've looked for a similar question on SO but could not find. What does this warning means and how could I "solve" ( I know it works even without doing anything) it?



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