--- a/heuristics/metadataHeuristics.php
+++ b/heuristics/metadataHeuristics.php
@@ -1,7 +1,7 @@
  <?php
 /* all
    SELECT description, count(*) as count
-FROM `contractnotice` 
+FROM contractnotice 
 group by description having count > 1 order by count
 */
 /*- duplicated description
@@ -14,8 +14,8 @@
 	$averageDuplicatedDescriptions = getAverageDuplicatedDescriptions();
 	$stddevDuplicatedDescriptions = getstddevDuplicatedDescriptions();
 	$query = 'select count(*) from contractnotice where description = "' . $agencyName . '"';
-	$result = mysql_query($query);
-	$r = mysql_fetch_array($result, MYSQL_BOTH);
+    $result = $conn->query($query);
+    $r = $result->fetch(PDO::FETCH_BOTH);
 	$dupeDesc = $r[0];
         if ($dupeDesc == 1) $value = 0;
 	else $value = abs($dupeDesc - $averageDuplicatedDescriptions) / $stddevDuplicatedDescriptions;
@@ -48,11 +48,11 @@
 {
 	$query = "select avg(count),STDDEV(count) from (
         SELECT description, count(*) as count
-FROM `contractnotice` 
+FROM contractnotice 
 group by description having count > 1 
         ) as a;";
-	$result = mysql_query($query);
-	$r = mysql_fetch_array($result, MYSQL_BOTH);
+    $result = $conn->query($query);
+    $r = $result->fetch(PDO::FETCH_BOTH);
 	$averageDuplicatedDescriptions = $r[0];
 	$stddevDuplicatedDescriptions = $r[1];
 }