diff --git a/cryptodatahub/common/key-exchange.json b/cryptodatahub/common/key-exchange.json
index ccbd986..9fbcf0e 100644
--- a/cryptodatahub/common/key-exchange.json
+++ b/cryptodatahub/common/key-exchange.json
@@ -128,7 +128,7 @@
     "HYBRID_PQS": {
         "name": "hybrid post-quantum safe",
         "long_name": null,
-        "vulnerabilities": null,
+        "vulnerabilities": [],
         "forward_secret": true
     },
     "SRP": {
diff --git a/cryptodatahub/common/key.py b/cryptodatahub/common/key.py
index c164a5e..2f5a44e 100644
--- a/cryptodatahub/common/key.py
+++ b/cryptodatahub/common/key.py
@@ -78,6 +78,8 @@ def __attrs_post_init__(self):
                     Vulnerability(attack_type=AttackType.DOS_ATTACK, grade=Grade.WEAK, named=AttackNamed.DHEAT_ATTACK)
                 )
             gradeables = [_PublicKeySizeGradeable(gradeables)]
+        elif self.key_type == KeyExchange.HYBRID_PQS:
+            gradeables = []
         else:
             gradeables = None