diff --git a/docs/source/api_reference/popup.rst b/docs/source/api_reference/popup.rst
index 6d5c64106..fddfdc0f7 100644
--- a/docs/source/api_reference/popup.rst
+++ b/docs/source/api_reference/popup.rst
@@ -56,5 +56,4 @@ auto_pan_padding         (5, 5)
 keep_in_view             False                   Set it to `True` if you want to prevent users from panning the popup off of the screen while it is open
 close_button             True                    Controls the presence of a close button in the popup
 close_on_escape_key      True                    Set it to `False` if you want to override the default behavior of the ESC key for closing of the popup
-class_name               ""                      A custom CSS class name to assign to the popup
 =====================    =====================   ===
diff --git a/ipyleaflet/leaflet.py b/ipyleaflet/leaflet.py
index 6157f325c..3a692a6e9 100644
--- a/ipyleaflet/leaflet.py
+++ b/ipyleaflet/leaflet.py
@@ -441,7 +441,6 @@ class Popup(UILayer):
     close_button = Bool(True).tag(sync=True, o=True)
     auto_close = Bool(True).tag(sync=True, o=True)
     close_on_escape_key = Bool(True).tag(sync=True, o=True)
-    class_name = Unicode('').tag(sync=True, o=True)
 
 
 class RasterLayer(Layer):
@@ -748,7 +747,6 @@ class Path(VectorLayer):
     line_cap = Enum(values=['round', 'butt', 'square'], default_value='round').tag(sync=True, o=True)
     line_join = Enum(values=['arcs', 'bevel', 'miter', 'miter-clip', 'round'], default_value='round').tag(sync=True, o=True)
     pointer_events = Unicode('').tag(sync=True, o=True)
-    class_name = Unicode('').tag(sync=True, o=True)
     opacity = Float(1.0, min=0.0, max=1.0).tag(sync=True, o=True)
 
 
diff --git a/js/src/layers/Path.js b/js/src/layers/Path.js
index b5cca5ade..b6fa72009 100644
--- a/js/src/layers/Path.js
+++ b/js/src/layers/Path.js
@@ -18,8 +18,7 @@ export class LeafletPathModel extends vectorlayer.LeafletVectorLayerModel {
       dash_array: null,
       line_cap: 'round',
       line_join: 'round',
-      pointer_events: '',
-      class_name: ''
+      pointer_events: ''
     };
   }
 }