diff --git a/src/main/java/org/codelibs/fess/app/web/admin/upgrade/AdminUpgradeAction.java b/src/main/java/org/codelibs/fess/app/web/admin/upgrade/AdminUpgradeAction.java
index a7db5ea5d..1cdff31fe 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/upgrade/AdminUpgradeAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/upgrade/AdminUpgradeAction.java
@@ -116,6 +116,8 @@ public class AdminUpgradeAction extends FessAdminAction {
 
     private static final String VERSION_14_11 = "14.11";
 
+    private static final String VERSION_14_12 = "14.12";
+
     // ===================================================================================
     //                                                                           Attribute
     //
@@ -212,6 +214,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -252,6 +255,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -291,6 +295,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -329,6 +334,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -366,6 +372,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -402,6 +409,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -437,6 +445,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -471,6 +480,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -504,6 +514,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -536,6 +547,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -567,6 +579,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -596,6 +609,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -624,6 +638,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -651,6 +666,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -677,6 +693,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -703,6 +720,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -728,6 +746,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -752,6 +771,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -775,6 +795,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -797,6 +818,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -818,6 +840,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -838,6 +861,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -857,6 +881,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -875,6 +900,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -892,6 +918,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -908,6 +935,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -923,6 +951,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -937,6 +966,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 upgradeFrom14_9();
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -950,6 +980,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
             try {
                 upgradeFrom14_10();
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -962,6 +993,7 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
         } else if (VERSION_14_11.equals(form.targetVersion)) {
             try {
                 upgradeFrom14_11();
+                upgradeFrom14_12();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -971,6 +1003,18 @@ public HtmlResponse upgradeFrom(final UpgradeForm form) {
                 logger.warn("Failed to upgrade data.", e);
                 saveError(messages -> messages.addErrorsFailedToUpgradeFrom(GLOBAL, VERSION_14_11, e.getLocalizedMessage()));
             }
+        } else if (VERSION_14_12.equals(form.targetVersion)) {
+            try {
+                upgradeFrom14_12();
+                upgradeFromAll();
+
+                saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
+
+                systemHelper.reloadConfiguration();
+            } catch (final Exception e) {
+                logger.warn("Failed to upgrade data.", e);
+                saveError(messages -> messages.addErrorsFailedToUpgradeFrom(GLOBAL, VERSION_14_12, e.getLocalizedMessage()));
+            }
         } else {
             saveError(messages -> messages.addErrorsUnknownVersionForUpgrade(GLOBAL));
         }
@@ -1190,6 +1234,10 @@ private void upgradeFrom14_11() {
         // nothing
     }
 
+    private void upgradeFrom14_12() {
+        // nothing
+    }
+
     private String[] getDictionaryPaths() {
         try (CurlResponse response = ComponentUtil.getCurlHelper().get("/_configsync/file").param("size", "1000").execute()) {
             if (response.getHttpStatusCode() == 200) {
diff --git a/src/main/java/org/codelibs/fess/helper/SystemHelper.java b/src/main/java/org/codelibs/fess/helper/SystemHelper.java
index fc7c3f80d..6b254f8e0 100644
--- a/src/main/java/org/codelibs/fess/helper/SystemHelper.java
+++ b/src/main/java/org/codelibs/fess/helper/SystemHelper.java
@@ -135,7 +135,7 @@ public void init() {
             logger.debug("Initialize {}", this.getClass().getSimpleName());
         }
         final Calendar cal = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
-        cal.set(2025, 8 - 1, 1); // EOL Date
+        cal.set(2025, 10 - 1, 1); // EOL Date
         eolTime = cal.getTimeInMillis();
         if (isEoled()) {
             logger.error("Your system is out of support. See https://fess.codelibs.org/eol.html");
diff --git a/src/main/webapp/WEB-INF/view/admin/upgrade/admin_upgrade.jsp b/src/main/webapp/WEB-INF/view/admin/upgrade/admin_upgrade.jsp
index 25337e260..8ab5ec9ca 100644
--- a/src/main/webapp/WEB-INF/view/admin/upgrade/admin_upgrade.jsp
+++ b/src/main/webapp/WEB-INF/view/admin/upgrade/admin_upgrade.jsp
@@ -80,6 +80,7 @@
 											<la:option value="14.9">14.9</la:option>
 											<la:option value="14.10">14.10</la:option>
 											<la:option value="14.11">14.11</la:option>
+											<la:option value="14.12">14.12</la:option>
 										</la:select>
 									</div>
 								</div>