diff --git a/apps/matrix/README.md b/apps/matrix/README.md
index d271538..c1a586f 100644
--- a/apps/matrix/README.md
+++ b/apps/matrix/README.md
@@ -1,5 +1,8 @@
 ## Usage and Components
 
+Note: as of 2021-12-25 this chart is available internally as apps/prod/matrix.
+
+
 ### Sample usage
 
 Setting up matrix for  ...