diff --git a/bulkredditdownloader/site_downloaders/download_factory.py b/bulkredditdownloader/site_downloaders/download_factory.py
index 84a6382..46e5c9b 100644
--- a/bulkredditdownloader/site_downloaders/download_factory.py
+++ b/bulkredditdownloader/site_downloaders/download_factory.py
@@ -47,4 +47,4 @@ class DownloadFactory:
         elif re.match(url_beginning + r'.*/.*\.\w{3,4}$', url):
             return Direct
         else:
-            raise NotADownloadableLinkError('No downloader module exists for url {}'.format(url))
+            raise NotADownloadableLinkError(f'No downloader module exists for url {url}')