diff --git a/data/avro-schema/src/main/resources/avro/net/corda/data/crypto/wire/ops/key/rotation/IndividualKeyRotationRequest.avsc b/data/avro-schema/src/main/resources/avro/net/corda/data/crypto/wire/ops/key/rotation/IndividualKeyRotationRequest.avsc
index e4bb28480..6b6969be6 100644
--- a/data/avro-schema/src/main/resources/avro/net/corda/data/crypto/wire/ops/key/rotation/IndividualKeyRotationRequest.avsc
+++ b/data/avro-schema/src/main/resources/avro/net/corda/data/crypto/wire/ops/key/rotation/IndividualKeyRotationRequest.avsc
@@ -14,6 +14,11 @@
       "type": "string",
       "doc": "Specifies the specific tenant that owns the old key."
     },
+    {
+      "name": "masterWrappingKeyAlias",
+      "type": ["null", "string"],
+      "doc": "Mandatory for unmanaged key rotation only, always null for managed key rotation. Specifies the default master wrapping key to rotate to."
+    },
     {
       "name": "targetKeyAlias",
       "type": ["null", "string"],
diff --git a/gradle.properties b/gradle.properties
index 7cecf6588..133551ca5 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -5,7 +5,7 @@ cordaProductVersion = 5.3.0
 # NOTE: update this each time this module contains a breaking change
 ## NOTE: currently this is a top level revision, so all API versions will line up, but this could be moved to
 ##   a per module property in which case module versions can change independently.
-cordaApiRevision = 11
+cordaApiRevision = 12
 
 # Main
 kotlin.stdlib.default.dependency = false