diff --git a/packages/runtime/src/useCases/transport/relationships/RelationshipMapper.ts b/packages/runtime/src/useCases/transport/relationships/RelationshipMapper.ts
index c705d7ab8..610b825d1 100644
--- a/packages/runtime/src/useCases/transport/relationships/RelationshipMapper.ts
+++ b/packages/runtime/src/useCases/transport/relationships/RelationshipMapper.ts
@@ -16,7 +16,7 @@ export class RelationshipMapper {
             template: RelationshipTemplateMapper.toRelationshipTemplateDTO(relationship.cache.template),
             status: relationship.status,
             peer: relationship.peer.address.toString(),
-            peerDeletionInfo: relationship.peerDeletionInfo,
+            peerDeletionInfo: relationship.peerDeletionInfo?.toJSON(),
             peerIdentity: {
                 address: relationship.peer.address.toString(),
                 publicKey: relationship.peer.publicKey.toBase64(false)
diff --git a/packages/transport/src/modules/relationships/local/PeerDeletionInfo.ts b/packages/transport/src/modules/relationships/local/PeerDeletionInfo.ts
index 007a9d55a..0213c5861 100644
--- a/packages/transport/src/modules/relationships/local/PeerDeletionInfo.ts
+++ b/packages/transport/src/modules/relationships/local/PeerDeletionInfo.ts
@@ -23,4 +23,8 @@ export class PeerDeletionInfo extends Serializable implements IPeerDeletionInfo
     public static from(value: IPeerDeletionInfo | PeerDeletionInfoJSON): PeerDeletionInfo {
         return this.fromAny(value);
     }
+
+    public override toJSON(): PeerDeletionInfoJSON {
+        return super.toJSON() as PeerDeletionInfoJSON;
+    }
 }