diff --git a/rpdata/api/Chapter.js b/rpdata/api/Chapter.js
index 09d7797..ef3e754 100644
--- a/rpdata/api/Chapter.js
+++ b/rpdata/api/Chapter.js
@@ -16,7 +16,7 @@ class Chapter {
     this.author = author
     this.source = source
     this.createdDate = new Date(createdDate)
-    this.fictionalDate = new Date(fictionalDate)
+    this.fictionalDate = fictionalDate != null ? new Date(fictionalDate) : null
     this.editedDate = new Date(editedDate)
   }
 
diff --git a/rpdata/api/Story.js b/rpdata/api/Story.js
index 36a0e77..15f7fa5 100644
--- a/rpdata/api/Story.js
+++ b/rpdata/api/Story.js
@@ -23,7 +23,7 @@ class Story {
     this.category = category
     this.createdDate = new Date(createdDate)
     this.updatedDate = new Date(updatedDate)
-    this.fictionalDate = new Date(fictionalDate)
+    this.fictionalDate = fictionalDate != null ? new Date(fictionalDate) : null
     this.tags = tags.map(dt => new Tag(dt.kind, dt.name))
     this.chapters = chapters != null ? chapters.map(c => new Chapter(c.id, c.title, c.author, c.source, c.createdDate, c.fictionalDate, c.editedDate)) : null
   }