diff --git a/index.php b/index.php
index b27cd7a..ee68ef1 100755
--- a/index.php
+++ b/index.php
@@ -41,33 +41,50 @@ if (
   if (strlen($_POST['txt']) >= 1 AND strlen($_POST['txt']) <= 4096)
     $params['txt'] = $_POST['txt'];
   else
+  {
+    http_response_code(400);
     exit("Wrong value for txt");
+  }
 
   if ($_POST['redondancy'] === "L" OR $_POST['redondancy'] === "M" OR $_POST['redondancy'] === "Q" OR $_POST['redondancy'] === "H")
     $params['redondancy'] = $_POST['redondancy'];
   else
+  {
+    http_response_code(400);
     exit("Wrong value for redondancy");
+  }
 
   if (is_numeric($_POST['margin']) AND $_POST['margin'] >= 0 AND $_POST['margin'] <= 128)
     $params['margin'] = $_POST['margin'];
   else
+  {
+    http_response_code(400);
     exit("Wrong value for margin");
+  }
 
   if (is_numeric($_POST['size']) AND $_POST['size'] >= 1 AND $_POST['size'] <= 128)
     $params['size'] = $_POST['size'];
   else
+  {
+    http_response_code(400);
     exit("Wrong value for size");
+  }
 
   if (preg_match("/^#[abcdefABCDEF0-9]{6}$/", $_POST['bgColor']))
     $params['bgColor'] = $_POST['bgColor'];
   else
+  {
+    http_response_code(400);
     exit("Wrong value for bgColor");
+  }
 
   if (preg_match("/^#[abcdefABCDEF0-9]{6}$/", $_POST['mainColor']))
     $params['mainColor'] = $_POST['mainColor'];
   else
+  {
+    http_response_code(400);
     exit("Wrong value for mainColor");
-
+  }
 }
 
 ?>