diff --git a/events/cognito.go b/events/cognito.go
index 9a27e879..c24a3e3e 100644
--- a/events/cognito.go
+++ b/events/cognito.go
@@ -144,6 +144,7 @@ type CognitoEventUserPoolsPostAuthenticationResponse struct {
 // CognitoEventUserPoolsMigrateUserRequest contains the request portion of a MigrateUser event
 type CognitoEventUserPoolsMigrateUserRequest struct {
 	Password       string            `json:"password"`
+	ValidationData map[string]string `json:"validationData"`
 	ClientMetadata map[string]string `json:"clientMetadata"`
 }
 
diff --git a/events/testdata/cognito-event-userpools-migrateuser.json b/events/testdata/cognito-event-userpools-migrateuser.json
index e5a77067..52e2c2fe 100644
--- a/events/testdata/cognito-event-userpools-migrateuser.json
+++ b/events/testdata/cognito-event-userpools-migrateuser.json
@@ -10,9 +10,12 @@
     },
     "request": {
         "password": "<password>",
+        "validationData": {
+            "exampleMetadataKey": "example metadata value"
+        },
         "clientMetadata": {
             "exampleMetadataKey": "example metadata value"
-          }
+        }
     },
     "response": {
         "userAttributes": {
@@ -27,4 +30,4 @@
         ],
         "forceAliasCreation": true
     }
-}
\ No newline at end of file
+}