diff --git a/notebooks/wp5/ozone_vertical_profile.ipynb b/notebooks/wp5/ozone_vertical_profile.ipynb
index 4d8c2f1..dacc574 100644
--- a/notebooks/wp5/ozone_vertical_profile.ipynb
+++ b/notebooks/wp5/ozone_vertical_profile.ipynb
@@ -174,7 +174,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "time = time = \"2005-08\"\n",
+    "time = \"2005-08\"\n",
     "ds[\"ozone_concentration\"].sel(time=time).plot(col=\"sensor\", col_wrap=3)"
    ]
   }