diff --git a/JsonConverter.bas b/JsonConverter.bas
index 876b865..a36eb7e 100644
--- a/JsonConverter.bas
+++ b/JsonConverter.bas
@@ -758,7 +758,7 @@ Private Function json_StringIsLargeNumber(json_String As Variant) As Boolean
     json_Length = VBA.Len(json_String)
 
     ' Length with be at least 16 characters and assume will be less than 100 characters
-    If json_Length >= 16 And json_Length <= 100 Then
+	If json_Length >= 16 And json_Length <= 100 And Left(json_String, 1) <> "0" Then
         Dim json_CharCode As String
 
         json_StringIsLargeNumber = True