diff --git a/package-lock.json b/package-lock.json
index 181e4c9..249b726 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@envoy/envoy-integrations-sdk",
-  "version": "2.5.3",
+  "version": "2.5.4",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@envoy/envoy-integrations-sdk",
-      "version": "2.5.3",
+      "version": "2.5.4",
       "license": "ISC",
       "dependencies": {
         "@types/dotenv": "^8.2.0",
diff --git a/package.json b/package.json
index 6a05b6b..e57152c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@envoy/envoy-integrations-sdk",
-  "version": "2.5.3",
+  "version": "2.5.4",
   "description": "SDK for building Envoy integrations.",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
diff --git a/src/resources/SignInFieldResource.ts b/src/resources/SignInFieldResource.ts
index 82947ec..479c094 100644
--- a/src/resources/SignInFieldResource.ts
+++ b/src/resources/SignInFieldResource.ts
@@ -35,6 +35,11 @@ export interface SignInFieldAttributes {
    * can answer, such as a badge or card number that is read off the credential.
    */
   'allow-employee-respondents'?: boolean;
+  /**
+   * Set by the server when a workflow policy owns this field. Read-only, so it
+   * is ignored on create and update.
+   */
+  'workflow-definition-field-id'?: string | null;
   'created-at'?: string;
   'updated-at'?: string;
 }