diff --git a/examples/icons.ipynb b/examples/icons.ipynb
index fb21fde..ec6291c 100644
--- a/examples/icons.ipynb
+++ b/examples/icons.ipynb
@@ -173,7 +173,7 @@
    },
    "outputs": [],
    "source": [
-    "from ipywidgets import Text, Checkbox\n",
+    "from ipywidgets import Text, Checkbox, IntText\n",
     "import json\n",
     "\n",
     "def noop(value):\n",
@@ -187,7 +187,7 @@
     "\n",
     "\n",
     "title_controls = []\n",
-    "for field_name in [\"label\", \"caption\", \"mnemonic\", \"icon_class\", \"class_name\", \"dataset\"]:\n",
+    "for field_name in [\"label\", \"caption\", \"icon_class\", \"class_name\", \"dataset\"]:\n",
     "    link_fn = noop\n",
     "    placeholder = \"\"\n",
     "    if field_name == \"dataset\":\n",
@@ -198,7 +198,7 @@
     "    title_controls.append(field)\n",
     "closable = Checkbox(description=\"closable?\")\n",
     "dlink((closable, \"value\"), (panel.title, \"closable\"))\n",
-    "title_controls.append(closable)\n",
+    "title_controls += [closable]\n",
     "panel.children = [icon_controls, *title_controls]"
    ]
   },
diff --git a/ipylab/widgets.py b/ipylab/widgets.py
index 1207bc5..f499647 100644
--- a/ipylab/widgets.py
+++ b/ipylab/widgets.py
@@ -20,7 +20,6 @@ class Title(Widget):
     closable = Bool(True).tag(sync=True)
     dataset = Dict().tag(sync=True)
     icon_label = Unicode().tag(sync=True)
-    mnemonic = Unicode().tag(sync=True)
 
     icon = Instance(Icon, allow_none=True).tag(sync=True, **widget_serialization)
 
diff --git a/src/widgets/shell.ts b/src/widgets/shell.ts
index baf9efe..3051e20 100644
--- a/src/widgets/shell.ts
+++ b/src/widgets/shell.ts
@@ -88,7 +88,6 @@ export class ShellModel extends WidgetModel {
       luminoWidget.title.closable = title.get('closable');
       luminoWidget.title.label = title.get('label');
       luminoWidget.title.dataset = title.get('dataset');
-      luminoWidget.title.mnemonic = title.get('mnemonic');
       luminoWidget.title.iconLabel = title.get('icon_label');
 
       const icon = await unpack_models(title.get('icon'), this.widget_manager);