diff --git a/lang/polish.txt b/lang/polish.txt
--- a/lang/polish.txt
+++ b/lang/polish.txt
@@ -156,7 +156,7 @@ STR_00B4_CAN_T_DO_THIS                  
 STR_00B5_CAN_T_CLEAR_THIS_AREA                                  :{WHITE}Nie mozna wyczyscic terenu...
 STR_00B6_ORIGINAL_COPYRIGHT                                     :{BLACK}Prawa Autorskie {COPYRIGHT} 1995 Chris Sawyer, Wszelkie Prawa Zastrzezone
 STR_00B7_VERSION                                                :{BLACK}Wersja OpenTTD {REV}
-STR_00BA_COPYRIGHT_OPENTTD                                      :{BLACK}OpenTTD {COPYRIGHT}2002-2005 Zespol OpenTTD
+STR_00BA_COPYRIGHT_OPENTTD                                      :{BLACK}OpenTTD {COPYRIGHT}2002-2006 Zespol OpenTTD
 STR_TRANSLATED_BY                                               :{BLACK}  Tlumacz(e) - : Tom and PolPot and Spooqy
 
 STR_00C5                                                        :{BLACK}{CROSS}