diff --git a/third_party/schema/README.chromium b/third_party/schema/README.chromium
index 5fcac0bcf..a122cd48e 100644
--- a/third_party/schema/README.chromium
+++ b/third_party/schema/README.chromium
@@ -4,6 +4,7 @@ Version: 0.6.6
 License: MIT
 License File: LICENSE-MIT
 Shipped: no
+Security Critical: no
 
 Description:
 schema is a library for validating Python data structures, such as those