diff --git a/docs/workshop-3/module-4-pca.ipynb b/docs/workshop-3/module-4-pca.ipynb
index e001527..5713899 100644
--- a/docs/workshop-3/module-4-pca.ipynb
+++ b/docs/workshop-3/module-4-pca.ipynb
@@ -1133,7 +1133,7 @@
     "id": "YZF9bUR3r6PU"
    },
    "source": [
-    "There are 52 columns, so we can't fit them all our screen. If we access the column headers we can see that the first 26 columns are all metadata relating to the mosquito sample, _e.g._ its sample ID, collection site, taxon, _etc._ \n",
+    "There are 52 columns, so we can't fit them all our screen. If we access the column headers we can see that the first 31 columns are all metadata relating to the mosquito sample, _e.g._ its sample ID, collection site, taxon, _etc._ \n",
     "  \n"
    ]
   },