diff --git a/recipes/fit-psd-lightcurve/fit-psd-lightcurve.ipynb b/recipes/fit-psd-lightcurve/fit-psd-lightcurve.ipynb
index 37de2ef..9dcfd80 100644
--- a/recipes/fit-psd-lightcurve/fit-psd-lightcurve.ipynb
+++ b/recipes/fit-psd-lightcurve/fit-psd-lightcurve.ipynb
@@ -505,9 +505,6 @@
    "execution_count": null,
    "id": "b08789fe-2a0a-4056-8b38-1aaea9946059",
    "metadata": {
-    "nbsphinx-thumbnail": {
-     "tooltip": "Fit the power spectral density of a lightcurve."
-    },
    },
    "outputs": [],
    "source": [