diff --git a/schema.sql b/schema.sql
index 7058f40..2e2953a 100644
--- a/schema.sql
+++ b/schema.sql
@@ -15,7 +15,7 @@ CREATE TABLE IF NOT EXISTS `accesstokens` (
   `one_time` tinyint(1) NOT NULL DEFAULT '0',
   `created` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
   `expires` datetime DEFAULT NULL,
-  `user_agent` varchar(255) NOT NULL,
+  `user_agent` varchar(255) DEFAULT NULL,
   PRIMARY KEY (`token`)
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1;
 
diff --git a/sqlite.sql b/sqlite.sql
index 8b5d2a1..6ce2b6b 100644
--- a/sqlite.sql
+++ b/sqlite.sql
@@ -15,7 +15,7 @@ CREATE TABLE IF NOT EXISTS `accesstokens` (
   one_time INTEGER NOT NULL DEFAULT '0',
   created DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
   expires DATETIME DEFAULT NULL,
-  user_agent TEXT NOT NULL
+  user_agent TEXT DEFAULT NULL
 );
 
 -- --------------------------------------------------------