diff --git a/docs/3.0/dynamic-filters.md b/docs/3.0/dynamic-filters.md
index 5c4fc48b..e5a78a07 100644
--- a/docs/3.0/dynamic-filters.md
+++ b/docs/3.0/dynamic-filters.md
@@ -38,6 +38,10 @@ class Project < ApplicationRecord
 end
 ```
 
+:::warning
+  Ensure the array items are strings, not symbols.
+:::
+
 This will make Avo add this new "Filters" button to the <Index /> view of your resource.
 
 When the user clicks the button, a new filters bar will appear below enabling them to add filters based on the attributes you marked as filterable.