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 2267fe20d..93b4adab5 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
@@ -58,6 +58,8 @@ public class AdminUpgradeAction extends FessAdminAction {
 
     private static final String VERSION_11_2 = "11.2";
 
+    private static final String VERSION_11_3 = "11.3";
+
     // ===================================================================================
     //                                                                           Attribute
     //
@@ -147,6 +149,7 @@ public class AdminUpgradeAction extends FessAdminAction {
                 upgradeFrom11_0();
                 upgradeFrom11_1();
                 upgradeFrom11_2();
+                upgradeFrom11_3();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -160,6 +163,7 @@ public class AdminUpgradeAction extends FessAdminAction {
             try {
                 upgradeFrom11_1();
                 upgradeFrom11_2();
+                upgradeFrom11_3();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -172,6 +176,7 @@ public class AdminUpgradeAction extends FessAdminAction {
         } else if (VERSION_11_2.equals(form.targetVersion)) {
             try {
                 upgradeFrom11_2();
+                upgradeFrom11_3();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -181,6 +186,18 @@ public class AdminUpgradeAction extends FessAdminAction {
                 logger.warn("Failed to upgrade data.", e);
                 saveError(messages -> messages.addErrorsFailedToUpgradeFrom(GLOBAL, VERSION_11_2, e.getLocalizedMessage()));
             }
+        } else if (VERSION_11_3.equals(form.targetVersion)) {
+            try {
+                upgradeFrom11_3();
+                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_11_3, e.getLocalizedMessage()));
+            }
         } else {
             saveError(messages -> messages.addErrorsUnknownVersionForUpgrade(GLOBAL));
         }
@@ -227,6 +244,14 @@ public class AdminUpgradeAction extends FessAdminAction {
                 "{\"properties\":{\"virtualHost\":{\"type\":\"keyword\"}}}");
     }
 
+    private void upgradeFrom11_3() {
+        final IndicesAdminClient indicesClient = fessEsClient.admin().indices();
+        final String configIndex = ".fess_config";
+
+        UpgradeUtil.addFieldMapping(indicesClient, configIndex, "related_content", "sortOrder",
+                "{\"properties\":{\"sortOrder\":{\"type\":\"integer\"}}}");
+    }
+
     private void upgradeFromAll() {
         final IndicesAdminClient indicesClient = fessEsClient.admin().indices();
         final String crawlerIndex = fessConfig.getIndexDocumentCrawlerIndex();
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 7d6f5305b..497e57894 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
@@ -47,6 +47,7 @@
 												<la:option value="11.0">11.0</la:option>
 												<la:option value="11.1">11.1</la:option>
 												<la:option value="11.2">11.2</la:option>
+												<la:option value="11.3">11.3</la:option>
 											</la:select>
 										</div>
 									</div>