diff --git a/dist/Notary/OfficeFolderAnchor.d.ts b/dist/Notary/OfficeFolderAnchor.d.ts
index f8111f7..b56d0be 100644
--- a/dist/Notary/OfficeFolderAnchor.d.ts
+++ b/dist/Notary/OfficeFolderAnchor.d.ts
@@ -9,9 +9,9 @@ export default class OfficeFolderAnchor extends Resource {
     blockchain?: EBlockchainName | string;
     status?: EAnchoringStatus | string;
     anchor_nb_try?: number;
-    tx_id?: string;
-    tx_link?: string;
-    tx_hash?: string;
+    tx_id: string | null;
+    tx_link: string | null;
+    tx_hash: string | null;
     folder?: OfficeFolder | null;
     anchored_at?: Date | null;
     created_at?: Date | null;
diff --git a/dist/Notary/OfficeFolderAnchor.js b/dist/Notary/OfficeFolderAnchor.js
index 4b2cad0..862f412 100644
--- a/dist/Notary/OfficeFolderAnchor.js
+++ b/dist/Notary/OfficeFolderAnchor.js
@@ -24,6 +24,9 @@ class OfficeFolderAnchor extends Resource_1.default {
         this.blockchain = EBlockchainName_1.default.TEZOS;
         this.status = EAnchoringStatus_1.default.QUEUED;
         this.anchor_nb_try = 0;
+        this.tx_id = null;
+        this.tx_link = null;
+        this.tx_hash = null;
         this.folder = null;
         this.anchored_at = null;
         this.created_at = null;
@@ -56,15 +59,15 @@ __decorate([
 ], OfficeFolderAnchor.prototype, "anchor_nb_try", void 0);
 __decorate([
     (0, class_transformer_1.Expose)(),
-    __metadata("design:type", String)
+    __metadata("design:type", Object)
 ], OfficeFolderAnchor.prototype, "tx_id", void 0);
 __decorate([
     (0, class_transformer_1.Expose)(),
-    __metadata("design:type", String)
+    __metadata("design:type", Object)
 ], OfficeFolderAnchor.prototype, "tx_link", void 0);
 __decorate([
     (0, class_transformer_1.Expose)(),
-    __metadata("design:type", String)
+    __metadata("design:type", Object)
 ], OfficeFolderAnchor.prototype, "tx_hash", void 0);
 __decorate([
     (0, class_transformer_1.Expose)(),
diff --git a/src/Notary/OfficeFolderAnchor.ts b/src/Notary/OfficeFolderAnchor.ts
index e502203..4422b8c 100644
--- a/src/Notary/OfficeFolderAnchor.ts
+++ b/src/Notary/OfficeFolderAnchor.ts
@@ -25,13 +25,13 @@ export default class OfficeFolderAnchor extends Resource {
     public anchor_nb_try?: number = 0;
 
     @Expose()
-    public tx_id?: string;
+    public tx_id: string | null = null;
 
     @Expose()
-    public tx_link?: string;
+    public tx_link: string | null = null;
 
     @Expose()
-    public tx_hash?: string;
+    public tx_hash: string | null = null;
 
     @Expose()
     @Type(() => OfficeFolder)