diff --git a/doc/en/html/about/history.html b/doc/en/html/about/history.html
index 2d61c9987..c7d5b32ed 100644
--- a/doc/en/html/about/history.html
+++ b/doc/en/html/about/history.html
@@ -33,7 +33,7 @@ <h1>History</h1>
 
 <h2 id="teraterm">Tera Term</h2>
 
-<h3 id="teraterm_5.6.2">YYYY.MM.DD (Ver 5.6.2 not released yet)</h3>
+<h3 id="teraterm_5.6.2">2026.07.15 (Ver 5.6.2)</h3>
 <ul class="history">
   <li>Changes
     <ul>
@@ -4183,7 +4183,7 @@ <h3 id="teraterm_0.0">1994.2.24 (Ver 0.0)</h3>
 
 <h2 id="ttssh">TTSSH</h2>
 
-<h3 id="ttssh_3.6.2">YYYY.MM.DD (Ver 3.6.2 not released yet)</h3>
+<h3 id="ttssh_3.6.2">2026.07.15 (Ver 3.6.2)</h3>
 <ul class="history">
   <li>Security fixes
     <ul>
@@ -6408,7 +6408,7 @@ <h3 id="ttproxy_1.0.0.8">2006.8.1 (Ver 1.0.0.8)</h3>
 
 <h2 id="ttmenu">TeraTerm Menu</h2>
 
-<h3 id="ttmenu_1.23">YYYY.MM.DD (Ver 1.23 not released yet)</h3>
+<h3 id="ttmenu_1.23">2026.07.15 (Ver 1.23)</h3>
 <ul class="history">
       <li>
         Fixed an issue where the default font name became garbled during initial setup.
diff --git a/doc/ja/html/about/history.html b/doc/ja/html/about/history.html
index d6ab1b82a..120dc3d93 100644
--- a/doc/ja/html/about/history.html
+++ b/doc/ja/html/about/history.html
@@ -33,7 +33,7 @@ <h1>
 
 <h2 id="teraterm">Tera Term</h2>
 
-<h3 id="teraterm_5.6.2">YYYY.MM.DD (Ver 5.6.2 not released yet)</h3>
+<h3 id="teraterm_5.6.2">2026.07.15 (Ver 5.6.2)</h3>
 <ul class="history">
   <li>•ΟX
     <ul>
@@ -4191,7 +4191,7 @@ <h3 id="teraterm_0.0">1994.2.24 (Ver 0.0)</h3>
 
 <h2 id="ttssh">TTSSH</h2>
 
-<h3 id="ttssh_3.6.2">YYYY.MM.DD (Ver 3.6.2 not released yet)</h3>
+<h3 id="ttssh_3.6.2">2026.07.15 (Ver 3.6.2)</h3>
 <ul class="history">
   <li>ƒZƒLƒ…ƒŠƒeƒBC³
     <ul>
@@ -6417,7 +6417,7 @@ <h3 id="ttproxy_1.0.0.8">2006.8.1 (Ver 1.0.0.8)</h3>
 
 <h2 id="ttmenu">TeraTerm Menu</h2>
 
-<h3 id="ttmenu_1.23">YYYY.MM.DD (Ver 1.23 not released yet)</h3>
+<h3 id="ttmenu_1.23">2026.07.15 (Ver 1.23)</h3>
 <ul class="history">
       <li>
         ‰Šϊέ’θŽž‚ΜƒfƒtƒHƒ‹ƒg‚ΜƒtƒHƒ“ƒg–Ό‚ͺ•ΆŽš‰»‚―‚·‚ι•s‹ο‡‚πC³‚΅‚½B
diff --git a/teraterm/common/tt-version.h b/teraterm/common/tt-version.h
index 9fe9f9837..c457372f7 100644
--- a/teraterm/common/tt-version.h
+++ b/teraterm/common/tt-version.h
@@ -31,7 +31,7 @@
 #define TT_VERSION_MAJOR             5
 #define TT_VERSION_MINOR             6
 #define TT_VERSION_PATCH             2
-#define TT_VERSION_SUBSTR            "RC"
+//#define TT_VERSION_SUBSTR            "dev"
 //#undef TT_VERSION_SUBSTR
 // SUBSTR が不要γͺ時は undef する
 //  使用例 "dev", "RC", "RC2"