diff --git a/README.md b/README.md
index dd845726..37fba2c8 100644
--- a/README.md
+++ b/README.md
@@ -260,7 +260,7 @@ You have to copy the 64-bit file into another place before loading.
     - Initial support of OLE controls.
     - Deleted MOleCtrl and added MOleHost.
     - Supported REGINST data.
-- v.5.4.9 (2021.XX.YY)
+- v.5.4.9 (2021.01.21)
     - Refresh ID List upon renaming treeview item.
 
 ## Contact Us
diff --git a/README.txt b/README.txt
index 869240b7..c4c96160 100644
--- a/README.txt
+++ b/README.txt
@@ -252,7 +252,7 @@ Question 6. Are the 64-bit files supported?
     - Initial support of OLE controls.
     - Deleted MOleCtrl and added MOleHost.
     - Supported REGINST data.
-- v.5.4.9 (2021.XX.YY)
+- v.5.4.9 (2021.01.21)
     - Refresh ID List upon renaming treeview item.
 
 /////////////////////////////////////////////////////////////////////
diff --git a/READMEIT.txt b/READMEIT.txt
index 026061cc..19c59002 100644
--- a/READMEIT.txt
+++ b/READMEIT.txt
@@ -253,7 +253,7 @@ Domanda 6. I file a 64 bit sono supportati?
     - Supporto iniziale controlli OLE.
     - Eliminato MOleCtrl e aggiunto MOleHost.
     - Supporto dati REGINST.
-- v.5.4.9 (YY.XX.2021)
+- v.5.4.9 (21.01.2021)
     - Aggiornamento ID List dopo aver rinominato l'elemento treeview.
 
 /////////////////////////////////////////////////////////////////////
diff --git a/READMEJP.txt b/READMEJP.txt
index f38c748e..b95b9bb4 100644
--- a/READMEJP.txt
+++ b/READMEJP.txt
@@ -595,7 +595,7 @@
         OLEコントロールの初期サポート。
         MOleCtrl を削除し MOleHost を追加。
         REGINST データをサポート。
-    v.5.4.9 (2021.XX.YY)
+    v.5.4.9 (2021.01.21)
         ツリービュー項目の名前の変更時にIDリストの表示を更新。
 
 /////////////////////////////////////////////////////