diff --git a/application/config/version.php b/application/config/version.php
index 20adf3ad096..a43cfb24369 100644
--- a/application/config/version.php
+++ b/application/config/version.php
@@ -13,7 +13,7 @@
  */
 
 $config['versionnumber'] = "2.05b4";
-$config['dbversionnumber'] = 169;
+$config['dbversionnumber'] = 170;
 $config['buildnumber'] = '';
 $config['updatable'] = true;
 
diff --git a/application/helpers/update/updatedb_helper.php b/application/helpers/update/updatedb_helper.php
index 922a5d64542..cec318e8dea 100644
--- a/application/helpers/update/updatedb_helper.php
+++ b/application/helpers/update/updatedb_helper.php
@@ -1124,10 +1124,15 @@ function db_upgrade_all($oldversion) {
 			// Remove old column.
 			Yii::app()->getDb()->createCommand()->dropColumn('{{surveys}}', 'allowjumps');
 			$db->createCommand()->update('{{settings_global}}',array('stg_value'=>169),"stg_name='DBVersion'");
-
 		}
-
         
+        if ($oldversion < 170)
+        {
+            // renamed advanced attributes fields dropdown_dates_year_min/max
+            $db->createCommand()->update('{{question_attributes}}',array('attribute'=>'date_min'),"attribute='dropdown_dates_year_min'");
+            $db->createCommand()->update('{{question_attributes}}',array('attribute'=>'date_max'),"attribute='dropdown_dates_year_max'");
+            $db->createCommand()->update('{{settings_global}}',array('stg_value'=>170),"stg_name='DBVersion'");
+        }
         $oTransaction->commit();
     }
     catch(Exception $e)
diff --git a/installer/sql/create-mssql.sql b/installer/sql/create-mssql.sql
index 94fe9fb9938..e1bfd758a6b 100644
--- a/installer/sql/create-mssql.sql
+++ b/installer/sql/create-mssql.sql
@@ -575,4 +575,4 @@ create unique index [permissions_idx2] ON [lime_permissions] ([entity_id], [enti
 --
 -- Version Info
 --
-INSERT INTO [prefix_settings_global] VALUES ('DBVersion', '169');
\ No newline at end of file
+INSERT INTO [prefix_settings_global] VALUES ('DBVersion', '170');
\ No newline at end of file
diff --git a/installer/sql/create-mysql.sql b/installer/sql/create-mysql.sql
index 66b8b6fdeb0..b0185e47890 100644
--- a/installer/sql/create-mysql.sql
+++ b/installer/sql/create-mysql.sql
@@ -581,4 +581,4 @@ create index `parent_qid_idx` on `prefix_questions` (`parent_qid`);
 --
 -- Version Info
 --
-INSERT INTO `prefix_settings_global` VALUES ('DBVersion', '169');
+INSERT INTO `prefix_settings_global` VALUES ('DBVersion', '170');
diff --git a/installer/sql/create-pgsql.sql b/installer/sql/create-pgsql.sql
index 22e7135590f..240b67be5e3 100644
--- a/installer/sql/create-pgsql.sql
+++ b/installer/sql/create-pgsql.sql
@@ -585,4 +585,4 @@ create unique index permissions_idx2 ON lime_permissions (entity_id, entity_name
 --
 -- Version Info
 --
-INSERT INTO prefix_settings_global VALUES ('DBVersion', '169');
+INSERT INTO prefix_settings_global VALUES ('DBVersion', '170');