diff --git a/scratchattach/other/project_json_capabilities.py b/scratchattach/other/project_json_capabilities.py
index 6e7d0858..ddf0e967 100644
--- a/scratchattach/other/project_json_capabilities.py
+++ b/scratchattach/other/project_json_capabilities.py
@@ -381,6 +381,7 @@ def to_json(self):
             return_data = dict(self.__dict__)
             return_data.pop("filename")
             return_data.pop("id")
+            return_data.pop("download_url")
             return return_data
 
         def download(self, *, filename=None, dir=""):