diff --git a/database_updates.php b/database_updates.php
index 57d4258a..99c8a1ed 100644
--- a/database_updates.php
+++ b/database_updates.php
@@ -2247,10 +2247,15 @@ if (LATEST_DATABASE_VERSION > CURRENT_DATABASE_VERSION) {
         mysqli_query($mysqli, "UPDATE `settings` SET `config_current_database_version` = '1.5.5'");
     }
 
-    // if (CURRENT_DATABASE_VERSION == '1.5.5') {
-    //     // Insert queries here required to update to DB version 1.5.6
+    if (CURRENT_DATABASE_VERSION == '1.5.5') {
+        mysqli_query($mysqli, "ALTER TABLE `contacts` ADD `contact_user_id` INT(11) NOT NULL DEFAULT 0 AFTER `contact_vendor_id`");
+        mysqli_query($mysqli, "UPDATE `settings` SET `config_current_database_version` = '1.5.6'");
+    }
+
+    // if (CURRENT_DATABASE_VERSION == '1.5.6') {
+    //     // Insert queries here required to update to DB version 1.5.7
     //     // Then, update the database to the next sequential version
-    //     mysqli_query($mysqli, "UPDATE `settings` SET `config_current_database_version` = '1.5.6'");
+    //     mysqli_query($mysqli, "UPDATE `settings` SET `config_current_database_version` = '1.5.7'");
     // }
 
 } else {
diff --git a/database_version.php b/database_version.php
index 6241a294..d8066879 100644
--- a/database_version.php
+++ b/database_version.php
@@ -5,4 +5,4 @@
  * It is used in conjunction with database_updates.php
  */
 
-DEFINE("LATEST_DATABASE_VERSION", "1.5.5");
+DEFINE("LATEST_DATABASE_VERSION", "1.5.6");
diff --git a/db.sql b/db.sql
index 79a02920..c91de864 100644
--- a/db.sql
+++ b/db.sql
@@ -420,6 +420,7 @@ CREATE TABLE `contacts` (
   `contact_accessed_at` datetime DEFAULT NULL,
   `contact_location_id` int(11) NOT NULL DEFAULT 0,
   `contact_vendor_id` int(11) NOT NULL DEFAULT 0,
+  `contact_user_id` int(11) NOT NULL DEFAULT 0,
   `contact_department` varchar(200) DEFAULT NULL,
   `contact_client_id` int(11) NOT NULL DEFAULT 0,
   PRIMARY KEY (`contact_id`)
@@ -2112,4 +2113,4 @@ CREATE TABLE `vendors` (
 /*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;
 /*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;
 
--- Dump completed on 2024-10-22 14:08:06
+-- Dump completed on 2024-10-22 16:33:28