diff --git a/notebooks/examples/openzh-covid-19-example.ipynb b/notebooks/examples/openzh-covid-19-example.ipynb
index 04aaea51692ddaafad9bb597c89399ac66a0a622..7d225834614423bd04caf0046b8aef3cefc0ad20 100644
--- a/notebooks/examples/openzh-covid-19-example.ipynb
+++ b/notebooks/examples/openzh-covid-19-example.ipynb
@@ -436,7 +436,6 @@
     "\n",
     "display(chart)\n",
     "if save_figures:\n",
-    "    chart.save(str(Path(figures_path) / 'switzerland-cases-by-canton.png'), webdriver='firefox')\n",
     "    chart.save(str(Path(figures_path) / 'switzerland-cases-by-canton.html'))\n",
     "    \n",
     "display(html_credits)"
@@ -549,7 +548,6 @@
     "display(html_credits)\n",
     "\n",
     "if save_figures:\n",
-    "    chart.save(str(Path(figures_path) / 'switzerland-deaths-by-canton.png'), webdriver='firefox')\n",
     "    chart.save(str(Path(figures_path) / 'switzerland-deaths-by-canton.html'))\n"
    ]
   },