diff --git a/.gitignore b/.gitignore
index 9fe4aef..46d52a0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,6 @@ fuzz/corpus/*/
 crash-*
 leak-*
 timeout-*
+
+# graphify knowledge graph (local index, not source)
+graphify-out/