diff --git a/notebooks/tutorial.ipynb b/notebooks/tutorial.ipynb
index efa568523..5122e2fdc 100644
--- a/notebooks/tutorial.ipynb
+++ b/notebooks/tutorial.ipynb
@@ -37,6 +37,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
+    "# download sample catalog\n",
     "!wget https://raw.githubusercontent.com/LSSTDESC/BlendingToolKit/main/data/sample_input_catalog.fits"
    ]
   },