Leaflet.boatmarker is broken in v0.3.0
The reason is probably the move to `leaflet 1.0`.
diff --git a/folium/plugins/boat_marker.py b/folium/plugins/boat_marker.py
index d6e8856..faed487 100644
--- a/folium/plugins/boat_marker.py
+++ b/folium/plugins/boat_marker.py
@@ -65,5 +65,5 @@ class BoatMarker(Marker):
                                             'if it is not in a Figure.')
 
         figure.header.add_child(
-            JavascriptLink('https://thomasbrueggemann.github.io/leaflet.boatmarker/js/leaflet.boatmarker.min.js'),  # noqa
+            JavascriptLink('https://unpkg.com/leaflet.boatmarker/leaflet.boatmarker.min.js'),  # noqa
             name='markerclusterjs')
diff --git a/tests/plugins/test_boat_marker.py b/tests/plugins/test_boat_marker.py
index b684278..97a5ad5 100644
--- a/tests/plugins/test_boat_marker.py
+++ b/tests/plugins/test_boat_marker.py
@@ -34,7 +34,7 @@ def test_boat_marker():
     out = m._parent.render()
 
     # We verify that the script import is present.
-    script = '<script src="https://thomasbrueggemann.github.io/leaflet.boatmarker/js/leaflet.boatmarker.min.js"></script>'  # noqa
+    script = '<script src="https://unpkg.com/leaflet.boatmarker/leaflet.boatmarker.min.js"></script>'  # noqa
     assert script in out
 
     # We verify that the script part is correct.
['folium/plugins/boat_marker.py', 'tests/plugins/test_boat_marker.py']