diff --git a/schema/cryptography-defs.json b/schema/cryptography-defs.json
index 761c6672..8b6a05c5 100644
--- a/schema/cryptography-defs.json
+++ b/schema/cryptography-defs.json
@@ -457,6 +457,21 @@
         }
       ]
     },
+    {
+      "family": "UMAC",
+      "standard": [
+        {
+          "name": "RFC4418",
+          "url": "https://doi.org/10.17487/RFC4418"
+        }
+      ],
+      "variant": [
+        {
+          "pattern": "UMAC[-(32|64|96|128)]",
+          "primitive": "mac"
+        }
+      ]
+    },
     {
       "family": "ChaCha",
       "standard": [