diff --git a/docs/paper/data.ipynb b/docs/paper/data.ipynb
index a7149c10..92d88fc6 100644
--- a/docs/paper/data.ipynb
+++ b/docs/paper/data.ipynb
@@ -164,7 +164,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "# Compute mean connectomes\n",
+    "## Compute mean connectomes\n",
     "\n",
     "This data will be used for plotting in Figure 2."
    ]