diff --git a/docs/io/output/rpacket_tracking.ipynb b/docs/io/output/rpacket_tracking.ipynb
index 168727da619..16f64f0ca93 100644
--- a/docs/io/output/rpacket_tracking.ipynb
+++ b/docs/io/output/rpacket_tracking.ipynb
@@ -150,7 +150,18 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "from tardis import run_tardis"
+    "from tardis import run_tardis\n",
+    "from tardis.io.atom_data.util import download_atom_data"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "7d8471c3",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "download_atom_data('kurucz_cd23_chianti_H_He')"
    ]
   },
   {