diff --git a/generate.php b/generate.php
index 2cda01c..c819c70 100644
--- a/generate.php
+++ b/generate.php
@@ -69,7 +69,7 @@ foreach (scandir('./images') as $inode) {
         ',
         $image_path,
         $thumbnail_path,
-        $alt_text ?: ''
+        htmlentities($alt_text ?: '')
     );
 }