diff --git a/Fig5_PyGMT_xarray.ipynb b/Fig5_PyGMT_xarray.ipynb
index 6e94561..9263d78 100644
--- a/Fig5_PyGMT_xarray.ipynb
+++ b/Fig5_PyGMT_xarray.ipynb
@@ -12,7 +12,7 @@
     "\n",
     "mars = pygmt.datasets.load_mars_relief(resolution=\"10m\")\n",
     "with pygmt.config(PROJ_ELLIPSOID=\"mars\"):\n",
-    "    mars_filter = mars.gmt.filter(filter=\"g50\", distance=4)\n",
+    "    mars_filter = mars.gmt.filter(filter=\"gaussian\", width=50, distance=\"geo_spherical\")\n",
     "    mars_grad = mars_filter.gmt.gradient(azimuth=-45, normalize=\"cauchy\")\n",
     "\n",
     "fig = pygmt.Figure()\n",