diff --git a/install/phpnuxbill.sql b/install/phpnuxbill.sql
index c13c25b7..26202e3a 100644
--- a/install/phpnuxbill.sql
+++ b/install/phpnuxbill.sql
@@ -24,10 +24,10 @@ CREATE TABLE `tbl_customers` (
   `pppoe_password` varchar(45) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL DEFAULT '' COMMENT 'For PPPOE Login',
   `fullname` varchar(45) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL,
   `address` mediumtext CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci,
-  `city` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL,
-  `district` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL,
-  `state` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL,
-  `zip` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL,
+  `city` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci,
+  `district` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci,
+  `state` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci,
+  `zip` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci,
   `phonenumber` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '0',
   `email` varchar(128) COLLATE utf8mb4_general_ci NOT NULL DEFAULT '1',
   `coordinates` VARCHAR(50) NOT NULL DEFAULT '' COMMENT 'Latitude and Longitude coordinates',
diff --git a/system/updates.json b/system/updates.json
index a5d3fc56..5f4d274a 100644
--- a/system/updates.json
+++ b/system/updates.json
@@ -101,6 +101,6 @@
         "ALTER TABLE `tbl_customers` CHANGE `status` `status` ENUM('Active','Banned','Disabled','Inactive','Limited','Suspended') CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL DEFAULT 'Active';"
     ],
     "2024.5.20" : [
-        "ALTER TABLE `tbl_customers` ADD `city` VARCHAR(255) NULL AFTER `address`, ADD `district` VARCHAR(255) NULL AFTER `city`, ADD `state` VARCHAR(255) NULL AFTER `district`, ADD `zip` VARCHAR(10) NULL AFTER `state`;"
+        "ALTER TABLE `tbl_customers` ADD `city` VARCHAR(255) AFTER `address`, ADD `district` VARCHAR(255) AFTER `city`, ADD `state` VARCHAR(255) AFTER `district`, ADD `zip` VARCHAR(10) AFTER `state`;"
     ]
 }
\ No newline at end of file