diff --git a/.hgignore b/.hgignore
index 14a5008..90b293a 100644
--- a/.hgignore
+++ b/.hgignore
@@ -12,5 +12,6 @@ build/
 graphics/
 web/Morris.*/
 web/Session.*/
+web/Library.*/
 Morris-.*
 Session-.*