diff --git a/schema/cryptography-defs.json b/schema/cryptography-defs.json
index 761c6672..4c1c1ad8 100644
--- a/schema/cryptography-defs.json
+++ b/schema/cryptography-defs.json
@@ -1028,6 +1028,21 @@
         }
       ]
     },
+    {
+      "family": "OPAQUE",
+      "standard": [
+        {
+          "name": "RFC9807",
+          "url": "https://doi.org/10.17487/RFC9807"
+        }
+      ],
+      "variant": [
+        {
+          "pattern": "OPAQUE-3DH[-{group}][-{hashFunction}]",
+          "primitive": "key-agree"
+        }
+      ]
+    },
     {
       "family": "MILENAGE",
       "standard": [