diff --git a/docs/phasenet_das.ipynb b/docs/phasenet_das.ipynb
index d2ae9f4..860f296 100644
--- a/docs/phasenet_das.ipynb
+++ b/docs/phasenet_das.ipynb
@@ -226,7 +226,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "### Support for OptaSense 1-minute data"
+    "## Support for OptaSense hdf5 format"
    ]
   },
   {