diff --git a/src/lang/vietnamese.txt b/src/lang/vietnamese.txt
--- a/src/lang/vietnamese.txt
+++ b/src/lang/vietnamese.txt
@@ -2643,7 +2643,7 @@ STR_LAI_OBJECT_DESCRIPTION_COMPANY_OWNED_LAND                   :Đất công ty sở hữu
 STR_ABOUT_OPENTTD                                               :{WHITE}Về OpenTTD
 STR_ABOUT_ORIGINAL_COPYRIGHT                                    :{BLACK}Nguyên tác bản quyền {COPYRIGHT} 1995 Chris Sawyer, All rights reserved
 STR_ABOUT_VERSION                                               :{BLACK}OpenTTD phiên bản {REV}
-STR_ABOUT_COPYRIGHT_OPENTTD                                     :{BLACK}OpenTTD {COPYRIGHT} 2002-2013 Nhóm OpenTTD
+STR_ABOUT_COPYRIGHT_OPENTTD                                     :{BLACK}OpenTTD {COPYRIGHT} 2002-2014 Nhóm OpenTTD
 
 # Save/load game/scenario
 STR_SAVELOAD_SAVE_CAPTION                                       :{WHITE}Lưu Ván Chơi