diff --git a/windows/winobject/system.py b/windows/winobject/system.py
index fa3abc2..9265ab8 100644
--- a/windows/winobject/system.py
+++ b/windows/winobject/system.py
@@ -264,28 +264,28 @@ class System(object):
 
     WINDOWS_10_BUILD_NUMBER_VERSION = {
         # (build_number, is_workstation): "version_name"
-        (10240, True): "Windows 10 Version 1507",
-        (10586, True): "Windows 10 Version 1511",
-        (14393, True): "Windows 10 Version 1607",
-        (15063, True): "Windows 10 Version 1703",
-        (16299, True): "Windows 10 Version 1709",
-        (17134, True): "Windows 10 Version 1803",
-        (17763, True): "Windows 10 Version 1809",
-        (18362, True): "Windows 10 Version 1903",
-        (18363, True): "Windows 10 Version 1909",
-        (19041, True): "Windows 10 Version 2004",
-        (19042, True): "Windows 10 Version 20H2",
-        (19043, True): "Windows 10 Version 21H1",
-        (19044, True): "Windows 10 Version 21H2",
-        (19045, True): "Windows 10 Version 22H2",
-        (22000, True): "Windows 11 Version 21H2",
-        (22621, True): "Windows 11 Version 22H2",
-        (22631, True): "Windows 11 Version 23H2",
-        (26100, True): "Windows 11 Version 24H2",
+        (10240, True): u"Windows 10 Version 1507",
+        (10586, True): u"Windows 10 Version 1511",
+        (14393, True): u"Windows 10 Version 1607",
+        (15063, True): u"Windows 10 Version 1703",
+        (16299, True): u"Windows 10 Version 1709",
+        (17134, True): u"Windows 10 Version 1803",
+        (17763, True): u"Windows 10 Version 1809",
+        (18362, True): u"Windows 10 Version 1903",
+        (18363, True): u"Windows 10 Version 1909",
+        (19041, True): u"Windows 10 Version 2004",
+        (19042, True): u"Windows 10 Version 20H2",
+        (19043, True): u"Windows 10 Version 21H1",
+        (19044, True): u"Windows 10 Version 21H2",
+        (19045, True): u"Windows 10 Version 22H2",
+        (22000, True): u"Windows 11 Version 21H2",
+        (22621, True): u"Windows 11 Version 22H2",
+        (22631, True): u"Windows 11 Version 23H2",
+        (26100, True): u"Windows 11 Version 24H2",
 
-        (14393, False): "Windows Server 2016",
-        (17763, False): "Windows Server 2019",
-        (20348, False): "Windows Server 2022",
+        (14393, False): u"Windows Server 2016",
+        (17763, False): u"Windows Server 2019",
+        (20348, False): u"Windows Server 2022",
     }
 
     def _get_version_name_for_10_build(self, build_number, is_workstation):