diff --git a/bootstrap.php b/bootstrap.php
index a296d54b..faa798f6 100644
--- a/bootstrap.php
+++ b/bootstrap.php
@@ -17,6 +17,7 @@ function _ovk_check_environment(): void
         $problems[] = "Composer dependencies missing";
     
     $requiredExtensions = [
+        "gd",
         "imagick",
         "fileinfo",
         "PDO",