diff --git a/tools/import-normalizer/.gitignore b/tools/import-normalizer/.gitignore
index d48fb3f8..426c6709 100644
--- a/tools/import-normalizer/.gitignore
+++ b/tools/import-normalizer/.gitignore
@@ -1,5 +1,6 @@
 .venv/
 out/
+!out/canonical-persons-tree.json
 review/
 __pycache__/
 *.pyc