diff --git a/ipascrape.py b/ipascrape.py
index 7727755..71b28e9 100755
--- a/ipascrape.py
+++ b/ipascrape.py
@@ -19,7 +19,7 @@ def apps_from_folder(dirname):
 
 def fetch_app(app, outdir):
     appname = app["Item Description"]
-    filename = os.path.join(outdir, f'{appname}.ipa')
+    filename = os.path.join(outdir, f'{appname.replace('/', '_')}.ipa')
     if os.path.exists(filename):
         print(f"{appname} exists, skipping")
     else: