diff --git a/src/types.ts b/src/types.ts
index 8d19e2ca..4512fae1 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -44,6 +44,7 @@ export declare interface AccessPaywallSeenEvent {
 
 export declare interface AccessReleaseEvent {
   widget: string;
+  releaseSignature?: string;
   actionName: string;
   trigger: string;
   triggerType: string;