diff --git a/site/content/data-literate/demo.mdx b/site/content/data-literate/demo.mdx
index 0ae01850..6833b5f6 100644
--- a/site/content/data-literate/demo.mdx
+++ b/site/content/data-literate/demo.mdx
@@ -237,7 +237,7 @@ https://vega.github.io/vega-lite/examples/interactive_multi_line_pivot_tooltip.h
 <VegaLite spec={ 
 {
   "$schema": "https://vega.github.io/schema/vega-lite/v5.json",
-  "data": {"url": "_files/HadCRUT.5.0.1.0.analysis.summary_series.global.annual.csv"},
+  "data": {"url": "/_files/HadCRUT.5.0.1.0.analysis.summary_series.global.annual.csv"},
   "width": 600,
   "height": 250,
   "mark": "line",
diff --git a/site/public/_files/HadCRUT.5.0.1.0.analysis.summary_series.global.annual.csv b/site/public/_files/HadCRUT.5.0.1.0.analysis.summary_series.global.annual.csv
new file mode 100644
index 00000000..304f991b
--- /dev/null
+++ b/site/public/_files/HadCRUT.5.0.1.0.analysis.summary_series.global.annual.csv
@@ -0,0 +1,173 @@
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