diff --git a/config.toml b/config.toml
index 25296e79bf..e5c4463b2c 100644
--- a/config.toml
+++ b/config.toml
@@ -152,6 +152,8 @@ navbar_translucent_over_cover_disable = false
 sidebar_menu_compact = true
 # Set to true to hide the sidebar search box (the top nav search box will still be displayed if search is enabled)
 sidebar_search_disable = true
+# Limit for number of children pages (This is an undocumented option)
+sidebar_menu_truncate = 128
 
 # Adds a H2 section titled "Feedback" to the bottom of each doc. The responses are sent to Google Analytics as events.
 # This feature depends on [services.googleAnalytics] and will be disabled if "services.googleAnalytics.id" is not set.
@@ -215,4 +217,4 @@ enable = true
     disable = false
   [[module.imports]]
     path = "github.com/google/docsy/dependencies"
-    disable = false    
\ No newline at end of file
+    disable = false