diff --git a/lhc_web/doc/CHANGELOG.txt b/lhc_web/doc/CHANGELOG.txt
index 35bb7bde90..5127893b93 100644
--- a/lhc_web/doc/CHANGELOG.txt
+++ b/lhc_web/doc/CHANGELOG.txt
@@ -1,3 +1,16 @@
+4.40v
+
+1. Visitors statistic charts are now generated much faster using database implementation.
+2. Iframe bot response type now supports forms.
+3. If same department alias is used for multiple departments, online status check will use department sort priority.
+4. Canned messages hashtag list will indicate we hit limit and not all results are rendered.
+5. Page based invitations now can be combined with general ones. https://doc.livehelperchat.com/docs/proactive#how-to-setup-url-based-invitations
+6. Offline form submit will use very first passed department to match online chat logic.
+7. Operators will be to test notifications from their account.
+8. Various other fixes.
+
+execute doc/update_db/update_310.sql for update
+
 4.39v
 
 1. https://github.com/LiveHelperChat/electron/releases Electron app was updated to 124 chrome version.
diff --git a/lhc_web/doc/update_db/structure.json b/lhc_web/doc/update_db/structure.json
index 30a7379456..8c94865bbf 100644
--- a/lhc_web/doc/update_db/structure.json
+++ b/lhc_web/doc/update_db/structure.json
@@ -11594,6 +11594,10 @@
       "new" : {"chat_id" : "ALTER TABLE `lh_chat_online_user_footprint` ADD INDEX `chat_id` (`chat_id`);"},
       "old" : ["chat_id_vtime"]
     },
+    "lh_chat_online_user" : {
+      "new" : {"first_visit" : "ALTER TABLE `lh_chat_online_user` ADD INDEX `first_visit` (`first_visit`);"},
+      "old" : []
+    },
     "lh_group" : {
       "new" : {"disabled" : "ALTER TABLE `lh_group` ADD INDEX `disabled` (`disabled`);"},
       "old" : []
diff --git a/lhc_web/doc/update_db/update_310.sql b/lhc_web/doc/update_db/update_310.sql
new file mode 100644
index 0000000000..aac68ea9ea
--- /dev/null
+++ b/lhc_web/doc/update_db/update_310.sql
@@ -0,0 +1 @@
+ALTER TABLE `lh_chat_online_user` ADD INDEX `first_visit` (`first_visit`), ALGORITHM=INPLACE, LOCK=NONE;
\ No newline at end of file
diff --git a/lhc_web/lib/core/lhcore/lhupdate.php b/lhc_web/lib/core/lhcore/lhupdate.php
index 7bb9f425f8..d831c0e795 100644
--- a/lhc_web/lib/core/lhcore/lhupdate.php
+++ b/lhc_web/lib/core/lhcore/lhupdate.php
@@ -3,8 +3,8 @@
 class erLhcoreClassUpdate
 {
 
-    const DB_VERSION = 309;
-    const LHC_RELEASE = 439;
+    const DB_VERSION = 310;
+    const LHC_RELEASE = 440;
 
 	public static function doTablesUpdate($definition){
 		$updateInformation = self::getTablesStatus($definition);
diff --git a/lhc_web/modules/lhinstall/install.php b/lhc_web/modules/lhinstall/install.php
index 9fc2247b3b..ac299db821 100644
--- a/lhc_web/modules/lhinstall/install.php
+++ b/lhc_web/modules/lhinstall/install.php
@@ -1686,6 +1686,7 @@
                   PRIMARY KEY (`id`),
                   KEY `vid` (`vid`),
 				  KEY `dep_id` (`dep_id`),
+				  KEY `first_visit` (`first_visit`),
 				  KEY `last_visit_dep_id` (`last_visit`,`dep_id`)
                 ) ENGINE=InnoDB CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;");