diff --git a/helpers/position.php b/helpers/position.php
index 185cf56..e969253 100644
--- a/helpers/position.php
+++ b/helpers/position.php
@@ -427,18 +427,18 @@ require_once(ROOT_DIR . "/helpers/upload.php");
     */
     private static function rowToObject($row) {
       $position = new uPosition();
-      $position->id = $row['id'];
-      $position->timestamp = $row['tstamp'];
-      $position->userId = $row['user_id'];
+      $position->id = (int) $row['id'];
+      $position->timestamp = (int) $row['tstamp'];
+      $position->userId = (int) $row['user_id'];
       $position->userLogin = $row['login'];
-      $position->trackId = $row['track_id'];
+      $position->trackId = (int) $row['track_id'];
       $position->trackName = $row['name'];
-      $position->latitude = $row['latitude'];
-      $position->longitude = $row['longitude'];
-      $position->altitude = $row['altitude'];
-      $position->speed = $row['speed'];
-      $position->bearing = $row['bearing'];
-      $position->accuracy = $row['accuracy'];
+      $position->latitude = (double) $row['latitude'];
+      $position->longitude = (double) $row['longitude'];
+      $position->altitude = (double) $row['altitude'];
+      $position->speed = (double) $row['speed'];
+      $position->bearing = (double) $row['bearing'];
+      $position->accuracy = (int) $row['accuracy'];
       $position->provider = $row['provider'];
       $position->comment = $row['comment'];
       $position->image = $row['image'];
diff --git a/helpers/track.php b/helpers/track.php
index aa19ef1..6010d41 100644
--- a/helpers/track.php
+++ b/helpers/track.php
@@ -234,8 +234,8 @@
     */
     private static function rowToObject($row) {
       $track = new uTrack();
-      $track->id = $row['id'];
-      $track->userId = $row['user_id'];
+      $track->id = (int) $row['id'];
+      $track->userId = (int) $row['user_id'];
       $track->name = $row['name'];
       $track->comment = $row['comment'];
       $track->isValid = true;
diff --git a/helpers/user.php b/helpers/user.php
index 9a3e3bb..b878343 100644
--- a/helpers/user.php
+++ b/helpers/user.php
@@ -230,7 +230,7 @@
     */
     private static function rowToObject($row) {
       $user = new uUser();
-      $user->id = $row['id'];
+      $user->id = (int) $row['id'];
       $user->login = $row['login'];
       $user->hash = $row['password'];
       $user->isAdmin = (bool) $row['admin'];