Replace rawgit with rawcdn.githack
@@ -77,7 +77,7 @@ class DualMap(MacroElement):
assert isinstance(figure, Figure), ('You cannot render this Element '
'if it is not in a Figure.')
- figure.header.add_child(JavascriptLink('https://rawgit.com/jieter/Leaflet.Sync/master/L.Map.Sync.js'), # noqa
+ figure.header.add_child(JavascriptLink('https://rawcdn.githack.com/jieter/Leaflet.Sync/master/L.Map.Sync.js'), # noqa
name='Leaflet.Sync')
super(DualMap, self).render(**kwargs)
