conda install version 0.4.4 gives leap second RuntimeError

installed conda version

If I update the gpstime module to version 0.4.4, I get the following error.
It worked using an older version, not sure which one exactly, I think 0.3.3. I am using Mac Sierra 10.12.6

In [1]: import gpstime                                                          
/anaconda3/envs/3gfn-paper-env/lib/python3.7/site-packages/gpstime/leaps.py:110: RuntimeWarning: Leap second data is expired.
  warnings.warn("Leap second data is expired.", RuntimeWarning)

In [2]: gpstime.__version__                                                     
Out[2]: '0.4.4'

In [3]: gpstime.gpsnow()                                                        
---------------------------------------------------------------------------
RuntimeError                              Traceback (most recent call last)
<ipython-input-3-40079e0c162c> in <module>
----> 1 gpstime.gpsnow()

/anaconda3/envs/3gfn-paper-env/lib/python3.7/site-packages/gpstime/__init__.py in gpsnow()
    219 
    220     """
--> 221     return gpstime.utcnow().replace(tzinfo=tzutc()).gps()
    222 
    223 

/anaconda3/envs/3gfn-paper-env/lib/python3.7/site-packages/gpstime/__init__.py in gps(self)
    191     def gps(self):
    192         """Return GPS time as a float."""
--> 193         return unix2gps(self.timestamp())
    194 
    195     def iso(self):

/anaconda3/envs/3gfn-paper-env/lib/python3.7/site-packages/gpstime/__init__.py in unix2gps(unix)
     44     unix = float(unix)
     45     gps = unix - GPS0
---> 46     for leap in LEAPDATA:
     47         if leap < GPS0:
     48             continue

/anaconda3/envs/3gfn-paper-env/lib/python3.7/site-packages/gpstime/leaps.py in __iter__(self)
    125     def __iter__(self):
    126         if not self.data:
--> 127             raise RuntimeError("Failed to load leap second data.")
    128         for leap in self.data:
    129             yield leap

RuntimeError: Failed to load leap second data.