diff --git a/res/Notepad3.exe.manifest b/res/Notepad3.exe.manifest
index 70e552124b..18392e37e5 100644
--- a/res/Notepad3.exe.manifest
+++ b/res/Notepad3.exe.manifest
@@ -21,6 +21,7 @@
 			<ws2:longPathAware xmlns:ws2="http://schemas.microsoft.com/SMI/2016/WindowsSettings">true</ws2:longPathAware>
 			<gdiScaling xmlns="http://schemas.microsoft.com/SMI/2017/WindowsSettings">false</gdiScaling> <!-- if set true, no WM_DPICHANGED message is send -->
 			<heapType xmlns="http://schemas.microsoft.com/SMI/2020/WindowsSettings">SegmentHeap</heapType>
+			<activeCodePage xmlns="http://schemas.microsoft.com/SMI/2019/WindowsSettings">UTF-8</activeCodePage>
 		</asmv3:windowsSettings>
 	</asmv3:application>
 	<ms_compatibility:compatibility xmlns:ms_compatibility="urn:schemas-microsoft-com:compatibility.v1" xmlns="urn:schemas-microsoft-com:compatibility.v1">