diff --git a/config/site_settings.yml b/config/site_settings.yml
index ea4bbd4b66..d49bb0e4cf 100644
--- a/config/site_settings.yml
+++ b/config/site_settings.yml
@@ -1382,8 +1382,7 @@ security:
       - Lax
       - Strict
       - Disabled
-      - None
-    regex: "^(Lax|Strict|Disabled|None)$"
+    regex: "^(Lax|Strict|Disabled)$"
   enable_escaped_fragments: true
   allow_index_in_robots_txt: true
   moderators_create_categories: false