diff --git a/README.md b/README.md
index 43be54a..e5d0cf7 100644
--- a/README.md
+++ b/README.md
@@ -223,7 +223,7 @@ The phases are:
 
 Note: `tuples_done` and `tuples_total` are only populated during the `loading tuples` phase
 
-### Filtering
+## Filtering
 
 There are a few ways to index nearest neighbor queries with a `WHERE` clause