diff --git a/entities/project_entity.php b/entities/project_entity.php
index 8f5ae79..cde9bbe 100644
--- a/entities/project_entity.php
+++ b/entities/project_entity.php
@@ -17,7 +17,7 @@ class Project extends Entity{
     private int     $_user;
     private int     $_category = 0;
     private string  $_creatorname;
-    private string  $_user_image;
+    private ?string  $_user_image = null;
 
 
     /**