diff --git a/templates/help.html b/templates/help.html
index f81032d..70a14f2 100644
--- a/templates/help.html
+++ b/templates/help.html
@@ -34,7 +34,7 @@
 
     <p><code>ecc_level</code> should be 1, 2, 3 or 4 where 1 is least resilient and 4 is most resilient</p>
 
-    <p><code>content</code> should be the value you wish the barcode to display. This may not accept all characters - that is dependent on the barcode type.</p>
+    <p><code>content</code> should be the value you wish the barcode to display. This should be a string and may not accept all characters - that is dependent on the barcode type.</p>
 
     <p>The response will be a PNG image</p>
 </body>