diff --git a/README.md b/README.md
index 595bd5f7..8aa27543 100644
--- a/README.md
+++ b/README.md
@@ -225,3 +225,9 @@ _<string>_
Grouping, currently only supports the option "week" which groups all the data by the start of the week, using your
first date column as the key. Simply sums all the other property fields.
+
+### width
+
+<length>
+
+Width of the nested chart element. Defaults to 26em
diff --git a/demo.html b/demo.html
index c9dce5fd..2958842a 100644
--- a/demo.html
+++ b/demo.html
@@ -10,7 +10,7 @@
@@ -106,7 +106,7 @@