diff --git a/Upgrade.md b/Upgrade.md
index 4b80cc9..6e5d67d 100644
--- a/Upgrade.md
+++ b/Upgrade.md
@@ -10,9 +10,9 @@ ALTER TABLE SmartlockLog ADD COLUMN  `List`  VARCHAR(24) FIRST;
 
 ALTER TABLE SmartlockAuth ADD COLUMN `accountUserId` VARCHAR(24) FIRST;
 ALTER TABLE SmartlockAuth ADD COLUMN `allowedFromDate` DATETIME NOT NULL AFTER `accountUserId`;
-ALTER TABLE SmartlockAuth ADD COLUMN `allowedFromTime` SMALLINT NOT NULL AFTER `allowedFromDate`;
+ALTER TABLE SmartlockAuth ADD COLUMN `allowedFromTime` SMALLINT AFTER `allowedFromDate`;
 ALTER TABLE SmartlockAuth ADD COLUMN `allowedUntilDate` DATETIME NOT NULL AFTER `allowedFromTime`;
-ALTER TABLE SmartlockAuth ADD COLUMN `allowedUntilTime` SMALLINT NOT NULL AFTER `allowedUntilDate`;
+ALTER TABLE SmartlockAuth ADD COLUMN `allowedUntilTime` SMALLINT AFTER `allowedUntilDate`;
 ALTER TABLE SmartlockAuth ADD COLUMN `allowedWeekDays` SMALLINT NOT NULL AFTER `allowedUntilTime`;
 
 ```
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