diff --git a/ts-interfaces/types/questions.ts b/ts-interfaces/types/questions.ts
index 899f0e1..79edaf6 100644
--- a/ts-interfaces/types/questions.ts
+++ b/ts-interfaces/types/questions.ts
@@ -2,6 +2,7 @@ import { AccountAddress, Timestamp } from './basic'
 import { Option } from './options'
 
 export enum QuestionType {
+	Null = 'Null',
 	Open = 'Open',
 	Fixed = 'Fixed',
 }
diff --git a/ts-interfaces/types/stamps.ts b/ts-interfaces/types/stamps.ts
index 8eb1fe1..6203fce 100644
--- a/ts-interfaces/types/stamps.ts
+++ b/ts-interfaces/types/stamps.ts
@@ -1,6 +1,7 @@
 import { AccountAddress, Timestamp } from './basic'
 
 export enum StampType {
+	Null = 'Null',
 	AccountOwnership = 'AccountOwnership',
 	FollowerSince = 'FollowerSince',
 }