diff --git a/nbs/01_chem.ipynb b/nbs/01_chem.ipynb
index 103553b6..fc72e9b6 100644
--- a/nbs/01_chem.ipynb
+++ b/nbs/01_chem.ipynb
@@ -525,7 +525,7 @@
     "\n",
     "    masses, intensity = mass_to_dist(mass, averagine_aa, isotopes)\n",
     "    plt.title(\"Averagine Isotopic Distribution for Mass {}\".format(mass))\n",
-    "    plt.stem(masses, intensity*100, use_line_collection=True)\n",
+    "    plt.stem(masses, intensity*100)\n",
     "    plt.ylabel(\"Relative Intensity (%)\")\n",
     "    plt.xlabel(\"Molecular Weight\")\n",
     "    plt.show()\n",