diff --git a/converter.py b/converter.py
index 28c897339d211c9e4c94230ead118af332ae487e..d3eac5a44c8aadbfbb87323460aafd3b77084020 100644
--- a/converter.py
+++ b/converter.py
@@ -26,7 +26,7 @@ class IConverter(ABC):
 
 class Converter(IConverter):
     def convert(self, num: int) -> str:
-        roman_numbers = [(500, 'D'), (100, 'C'), (50, 'L'), (40, 'XL'), (10, 'X'), (9, 'IX'), (5, 'V'), (4, 'IV'), (1, 'I')]
+        roman_numbers = [(1000, 'M'), (500, 'D'), (100, 'C'), (50, 'L'), (40, 'XL'), (10, 'X'), (9, 'IX'), (5, 'V'), (4, 'IV'), (1, 'I')]
         
         roman_str = ''
 
@@ -86,6 +86,10 @@ class TestConverter(unittest.TestCase):
         res = self.c.convert(500)
         self.assertEqual(res, 'D')
 
+    def test_convertThousand(self):
+        res = self.c.convert(1000)
+        self.assertEqual(res, 'M')
+