diff --git a/app.py b/app.py
index c51bfa2..86c87cd 100644
--- a/app.py
+++ b/app.py
@@ -90,7 +90,7 @@ def index():
 
                 # You can now send png_bytes to a response or store it in a DB
                 print(f"Page {page_index} is {len(png_bytes)} bytes.")
-                zf.writestr("{}/{}{:04d}.png".format(filenameref, filenameref, page_index), png_bytes)
+                zf.writestr("{}/{}-slide-number-{:02d}.png".format(filenameref, filenameref, page_index), png_bytes)
 
         doc.close()