diff --git a/app/controllers/api/functions.php b/app/controllers/api/functions.php
index f13baff11..5f95fa7d6 100644
--- a/app/controllers/api/functions.php
+++ b/app/controllers/api/functions.php
@@ -26,7 +26,7 @@ App::post('/v1/functions')
     ->param('name', '', function () { return new Text(128); }, 'Function name.')
     ->param('env', '', function () { return new WhiteList(array_keys(Config::getParam('environments'))); }, 'Execution enviornment.')
     ->param('vars', [], function () { return new Assoc();}, 'Key-value JSON object.', true)
-    ->param('events', null, function () { return new ArrayList(new WhiteList(array_keys(Config::getParam('events')), true)); }, 'Events list.', true)
+    ->param('events', [], function () { return new ArrayList(new WhiteList(array_keys(Config::getParam('events')), true)); }, 'Events list.', true)
     ->param('schedule', '', function () { return new Cron(); }, 'Schedule CRON syntax.', true)
     ->param('timeout', 15, function () { return new Range(1, 900); }, 'Function maximum execution time in seconds.', true)
     ->action(function ($name, $env, $vars, $events, $schedule, $timeout, $response, $projectDB) {
@@ -118,7 +118,7 @@ App::put('/v1/functions/:functionId')
     ->param('functionId', '', function () { return new UID(); }, 'Function unique ID.')
     ->param('name', '', function () { return new Text(128); }, 'Function name.')
     ->param('vars', [], function () { return new Assoc();}, 'Key-value JSON object.', true)
-    ->param('events', null, function () { return new ArrayList(new WhiteList(array_keys(Config::getParam('events')), true)); }, 'Events list.', true)
+    ->param('events', [], function () { return new ArrayList(new WhiteList(array_keys(Config::getParam('events')), true)); }, 'Events list.', true)
     ->param('schedule', '', function () { return new Cron(); }, 'Schedule CRON syntax.', true)
     ->param('timeout', 15, function () { return new Range(1, 900); }, 'Function maximum execution time in seconds.', true)
     ->action(function ($functionId, $name, $vars, $events, $schedule, $timeout, $response, $projectDB) {