diff --git a/include/version.inc.php b/include/version.inc.php
index b0cc6d0e..d95474b4 100644
--- a/include/version.inc.php
+++ b/include/version.inc.php
@@ -2,7 +2,7 @@
 $defflip = (!cfip()) ? exit(header('HTTP/1.1 401 Unauthorized')) : 1;
 
 define('MPOS_VERSION', '1.0.9');
-define('DB_VERSION', '1.0.2');
+define('DB_VERSION', '1.0.3');
 define('CONFIG_VERSION', '1.0.1');
 define('HASH_VERSION', 1);
 
diff --git a/sql/000_base_structure.sql b/sql/000_base_structure.sql
index 9ab29f71..88101fce 100644
--- a/sql/000_base_structure.sql
+++ b/sql/000_base_structure.sql
@@ -142,7 +142,7 @@ CREATE TABLE IF NOT EXISTS `settings` (
   UNIQUE KEY `setting` (`name`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
-INSERT INTO `settings` (`name`, `value`) VALUES ('DB_VERSION', '1.0.2');
+INSERT INTO `settings` (`name`, `value`) VALUES ('DB_VERSION', '1.0.3');
 
 CREATE TABLE IF NOT EXISTS `shares` (
   `id` bigint(30) NOT NULL AUTO_INCREMENT,
@@ -182,9 +182,9 @@ CREATE TABLE IF NOT EXISTS `statistics_shares` (
   `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
   `account_id` int(10) unsigned NOT NULL,
   `block_id` int(10) unsigned NOT NULL,
-  `valid` bigint(20) NOT NULL,
+  `valid` bigint(20) NOT NULL DEFAULT '0',
   `invalid` bigint(20) NOT NULL DEFAULT '0',
-  `pplns_valid` bigint(20) NOT NULL,
+  `pplns_valid` bigint(20) NOT NULL DEFAULT '0',
   `pplns_invalid` bigint(20) NOT NULL DEFAULT '0',
   PRIMARY KEY (`id`),
   KEY `account_id` (`account_id`),
diff --git a/upgrade/definitions/1.0.2_to_1.0.3.inc.php b/upgrade/definitions/1.0.2_to_1.0.3.inc.php
new file mode 100644
index 00000000..fddd7a35
--- /dev/null
+++ b/upgrade/definitions/1.0.2_to_1.0.3.inc.php
@@ -0,0 +1,32 @@
+<?php
+function run_103() {
+  // Ugly but haven't found a better way
+  global $setting, $config, $coin_address, $user, $mysqli;
+
+  // Version information
+  $db_version_old = '1.0.2';  // What version do we expect
+  $db_version_new = '1.0.3';  // What is the new version we wish to upgrade to
+  $db_version_now = $setting->getValue('DB_VERSION');  // Our actual version installed
+
+  // Upgrade specific variables
+  $aSql[] = "UPDATE `statistics_shares` SET `valid` = '0' WHERE `valid` IS NULL;";
+  $aSql[] = "UPDATE `statistics_shares` SET `pplns_valid` = '0' WHERE `pplns_valid` IS NULL;";
+  $aSql[] = "ALTER TABLE `statistics_shares` CHANGE `valid` `valid` BIGINT(20) NOT NULL DEFAULT '0', CHANGE `pplns_valid` `pplns_valid` BIGINT(20) NOT NULL DEFAULT '0';";
+  $aSql[] = "UPDATE " . $setting->getTableName() . " SET value = '" . $db_version_new . "' WHERE name = 'DB_VERSION';";
+
+  if ($db_version_now == $db_version_old && version_compare($db_version_now, DB_VERSION, '<')) {
+    // Run the upgrade
+    echo '- Starting database migration to version ' . $db_version_new . PHP_EOL;
+    foreach ($aSql as $sql) {
+      echo '-  Preparing: ' . $sql . PHP_EOL;
+      $stmt = $mysqli->prepare($sql);
+      if ($stmt && $stmt->execute()) {
+        echo '-    success' . PHP_EOL;
+      } else {
+        echo '-    failed: ' . $mysqli->error . PHP_EOL;
+        exit(1);
+      }
+    }
+  }
+}
+?>