diff --git a/Classes/Blocker.php b/Classes/Blocker.php
index dfc032a..3763b96 100644
--- a/Classes/Blocker.php
+++ b/Classes/Blocker.php
@@ -144,7 +144,7 @@ public function badWords()
             }
             $pattern = "/\b{$value['word']}\b/iu";
 
-            return preg_match($pattern, $this->text, $matches, PREG_UNMATCHED_AS_NULL);
+            return preg_match($pattern, $this->text ?? '', $matches, PREG_UNMATCHED_AS_NULL);
         })->map(function ($value) {
             return [
                 'language' => $value['language'],