diff --git a/BancaDati/BancaDati.php b/BancaDati/BancaDati.php
index 12f9205..dd4823a 100644
--- a/BancaDati/BancaDati.php
+++ b/BancaDati/BancaDati.php
@@ -71,7 +71,7 @@ class BancaDati {
     public function update(string $table, string $id, array $values){
         $value = "";
         foreach ($values as $col => $v){
-            $value .= $col . "=" . $v . ",";
+            $value .= $col . "=" . "'" . $v . "'" . ",";
         }
         $value = trim($value, ",");
 
@@ -80,6 +80,7 @@ class BancaDati {
             $sth = $this->pdo->prepare($sql);
             $sth->execute();
         }catch (PDOException $e){
+            var_dump($e);
             die;
         }
     }