diff --git a/createreadmes.py b/createreadmes.py
index 280f11e..dad36b5 100644
--- a/createreadmes.py
+++ b/createreadmes.py
@@ -3,7 +3,7 @@ import json
 import itertools
 import yaml
 import jsonschema
-from typing import Any
+from typing import Any, TypedDict
 import requests
 try:
     from yachalk import chalk
@@ -55,13 +55,13 @@ def get_file(slug: str, path: str):
 def plural(amount: int, name: str, plural: str = 's'):
     return f"{amount} {name}{plural[:amount^1]}"
 
-from typing import NamedTuple
+from typing import TypedDict
 
-class Artifact(NamedTuple):
+class Artifact(TypedDict):
     file: str
     lines: list[int]
 
-class SecurityRule(NamedTuple):
+class SecurityRule(TypedDict):
     status: str
     argument: str
     artifacts: None | list[Artifact]
@@ -99,8 +99,11 @@ def check_security_rules(security_rules: dict[Any, Any] | None) -> dict[int, Sec
     for n in range(1, 19):
         try:
             rule = security_rules.get(n, None)
-            if rule is None: raise jsonschema.ValidationError('Rule {} is not evaluated'.format(n))
+            if rule is None: raise jsonschema.ValidationError(f"Rule {n} is not evaluated")
             jsonschema.validate(rule, rule_schema)
+            rule: SecurityRule
+            if rule["status"] == "unknown":
+                warning(f"Rule {n} is still unknown!")
         except jsonschema.ValidationError as e:
             error("Security rule {n}: {msg} at $.{n}.{path}".format(n=n, msg=e.message, path=e.json_path))
             warning("Not checking further rules!")