diff --git a/HaDocumentV6/Models/Meta.cs b/HaDocumentV6/Models/Meta.cs
index e8131f3..fc5033c 100644
--- a/HaDocumentV6/Models/Meta.cs
+++ b/HaDocumentV6/Models/Meta.cs
@@ -33,8 +33,8 @@ namespace HaDocument.Models {
         public AdditionalDates? AdditionalDates { get; } = null;
         public int Order { get; } = -1;
         public string Location { get; } = "";
-        public List<string> Senders { get; } = null;
-        public List<string> Receivers { get; } = null;
+        public List<string>? Senders { get; } = null;
+        public List<string>? Receivers { get; } = null;
         public bool? hasOriginal { get; }
         public bool? isProofread { get; }
         public bool? isDraft { get; }
diff --git a/HaDocumentV6/Reactors/MetaReactor.cs b/HaDocumentV6/Reactors/MetaReactor.cs
index 7d41e74..e759240 100644
--- a/HaDocumentV6/Reactors/MetaReactor.cs
+++ b/HaDocumentV6/Reactors/MetaReactor.cs
@@ -103,8 +103,8 @@ namespace HaDocument.Reactors {
                     Order = res2;
 
                     AdditionalDates = new AdditionalDates(
-                        GetDateTime(tag["notBefore"]),
-                        GetDateTime(tag["notAfter"]),
+                        GetDateTime(tag["notbefore"]),
+                        GetDateTime(tag["notafter"]),
                         GetDateTime(tag["from"]),
                         GetDateTime(tag["to"]),
                         tag["cert"]