diff --git a/docs/quickstart/quickstart.ipynb b/docs/quickstart/quickstart.ipynb
index 2b5a3ce0dab..ce7b1ca7572 100644
--- a/docs/quickstart/quickstart.ipynb
+++ b/docs/quickstart/quickstart.ipynb
@@ -100,9 +100,9 @@
     "spectrum_integrated = sim.runner.spectrum_integrated\n",
     "\n",
     "figure(figsize=(10,6))\n",
-    "plot(spectrum.wavelength, spectrum.luminosity_density_lambda, label='normal packets')\n",
-    "plot(spectrum.wavelength, spectrum_virtual.luminosity_density_lambda, label='virtual packets')\n",
-    "plot(spectrum.wavelength, spectrum_integrated.luminosity_density_lambda, label='formal integral')\n",
+    "spectrum.plot(label='normal packets')\n",
+    "spectrum_virtual.plot(label='virtual packets')\n",
+    "spectrum_integrated.plot(label='formal integral')\n",
     "xlabel('Wavelength [$\\AA$]')\n",
     "ylabel('Luminosity [erg/s/$\\AA$]')\n",
     "legend()\n",
@@ -133,7 +133,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.8"
+   "version": "3.8.3"
   },
   "nbsphinx": {
    "execute": "always",