diff --git a/Obsolete.md b/Obsolete.md
index 1d8834c..5c31621 100644
--- a/Obsolete.md
+++ b/Obsolete.md
@@ -1,3 +1,6 @@
+# From v0.5.30 on
+The `external_flt_grid` flag is no longer supported
+
 # From v0.5.21 on
 The `paging` configuration option now includes the following properties:
 - `length`