diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Load.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Load.cs
index a862a42..a31c55e 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Load.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Load.cs
@@ -75,7 +75,7 @@
                     else if (m.VTFileTime != null)
                     {
                         CustomProperties.Add(name,
-                                             DateTime.ParseExact(m.VTFileTime.Text, "yyyy'-'MM'-'dd'T'HH':'mm':'ss'Z'",
+                                             DateTime.ParseExact(m.VTFileTime.Text, "yyyy'-'MM'-'dd'T'HH':'mm':'ssK",
                                                                  CultureInfo.InvariantCulture));
                     }
                     else if (m.VTDouble != null)