diff --git a/blender_cloud/flamenco/__init__.py b/blender_cloud/flamenco/__init__.py
index 9454585..a863c45 100644
--- a/blender_cloud/flamenco/__init__.py
+++ b/blender_cloud/flamenco/__init__.py
@@ -418,7 +418,7 @@ def _render_output_path(
 
     # Blender will have to append the file extensions by itself.
     if is_image_type(render_image_format):
-        return dir_components / '#####'
+        return dir_components / '######'
     return dir_components / flamenco_render_frame_range