diff --git a/unpack-whenwe-json.js b/unpack-whenwe-json.js
index 7992ea1..b1a54ab 100644
--- a/unpack-whenwe-json.js
+++ b/unpack-whenwe-json.js
@@ -1,3 +1,7 @@
+/*
+  Reads in the Drupal node dump of WhenWe data from ./whenwe.json
+  Writes it converted to markdown with frontmatter, organised in subdirectories, in out/
+*/
 const data = require('./whenwe.json');
 const fs = require('fs');
 const path = require('path');
@@ -8,7 +12,7 @@ const nhm = new NodeHtmlMarkdown({
 });
 
 function toYaml(data, body) {
-  const frontmatter = Object.keys(data).sort().map(key => key+': '+(data[key] ? '"'+data[key]+'"' : '')).join("\n");
+  const frontmatter = Object.keys(data).sort().map(key => key+': '+(data[key] ? JSON.stringify(data[key]) : '')).join("\n");
   return "---\n" + frontmatter + "\n---\n" + nhm.translate(body);
 }