diff --git a/FileTypeChecker/Types/MicrosoftOffice365Document.cs b/FileTypeChecker/Types/MicrosoftOffice365Document.cs
index 0ce4f11..800228d 100644
--- a/FileTypeChecker/Types/MicrosoftOffice365Document.cs
+++ b/FileTypeChecker/Types/MicrosoftOffice365Document.cs
@@ -12,6 +12,7 @@ public class MicrosoftOffice365Document : FileType, IFileType
         {
             new(new byte[] { 0x50, 0x4B, 0x03, 0x04, 0x14, 0x00, 0x06, 0x00, 0x08, 0x00, 0x00, 0x00, 0x21, 0x00 }),
             new(new byte[] { 0x50, 0x4B, 0x03, 0x04, 0x14, 0x00, 0x08, 0x08, 0x08, 0x00 }),
+            new(new byte[] { 0x50, 0x4B, 0x03, 0x04, 0x14, 0x00, 0x00, 0x08, 0x08, 0x00 }),
             new(new byte[] { 0x50, 0x4B, 0x03, 0x04, 0x14, 0x00, 0x00, 0x00, 0x08, 0x00 }),
             new(new byte[] { 0x50, 0x4B, 0x03, 0x04, 0x14, 0x00, 0x06, 0x00 }),
             new(new byte[] { 0x50, 0x4B, 0x03, 0x04, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0xC8 })