diff --git a/src/Lemon/Templating/Environment.php b/src/Lemon/Templating/Environment.php
index 1582637..0553bcb 100644
--- a/src/Lemon/Templating/Environment.php
+++ b/src/Lemon/Templating/Environment.php
@@ -35,6 +35,6 @@ public function escapeScript(mixed $content): string
      */
     public function escapeAttribute(mixed $content): string
     {
-        return str_starts_with((string) $content, 'javascript:') ? '' : htmlspecialchars($content);
+        return str_starts_with((string) $content, 'javascript:') ? '' : htmlspecialchars((string) $content);
     }
 }