diff --git a/scan.php b/scan.php
index a9715a9..de3fa94 100644
--- a/scan.php
+++ b/scan.php
@@ -206,7 +206,7 @@ class MalwareScanner
                 if ($toSearch[0] === '#') {
                     continue;
                 }
-                if (preg_match('/' . $toSearch . '/is', $fileContent)) {
+                if (preg_match('/' . $toSearch . '/im', $fileContent)) {
                     $found = true;
                     break;
                 }