diff --git a/src/application/migrations/006_add_calendar_view_setting.php b/src/application/migrations/006_add_calendar_view_setting.php
index b6739983..f7383fc1 100644
--- a/src/application/migrations/006_add_calendar_view_setting.php
+++ b/src/application/migrations/006_add_calendar_view_setting.php
@@ -19,8 +19,7 @@ class Migration_Add_calendar_view_setting extends CI_Migration {
             'calendar_view' => [ 
                 'type' => 'VARCHAR',
                 'constraint' => '32', 
-                'default' => 'default', 
-                'null' => true
+                'default' => 'default'
             ]
         ]; 
 
diff --git a/src/application/migrations/007_add_service_availabilities_type.php b/src/application/migrations/007_add_service_availabilities_type.php
index 48c0b2a5..44809d71 100644
--- a/src/application/migrations/007_add_service_availabilities_type.php
+++ b/src/application/migrations/007_add_service_availabilities_type.php
@@ -19,8 +19,7 @@ class Migration_Add_service_availabilities_type extends CI_Migration {
             'availabilities_type' => [ 
                 'type' => 'VARCHAR',
                 'constraint' => '32', 
-                'default' => 'flexible', 
-                'null' => true,
+                'default' => 'flexible',
                 'after' => 'description'
             ]
         ]; 
diff --git a/src/application/migrations/008_add_service_attendants_number.php b/src/application/migrations/008_add_service_attendants_number.php
index 323f32f4..6739e8ce 100644
--- a/src/application/migrations/008_add_service_attendants_number.php
+++ b/src/application/migrations/008_add_service_attendants_number.php
@@ -20,7 +20,6 @@ class Migration_Add_service_attendants_number extends CI_Migration {
                 'type' => 'INT',
                 'constraint' => '11', 
                 'default' => '1', 
-                'null' => true,
                 'after' => 'availabilities_type'
             ]
         ];