diff --git a/examples/rss/rss.py b/examples/rss/rss.py
index bc93de1..7364da5 100755
--- a/examples/rss/rss.py
+++ b/examples/rss/rss.py
@@ -170,7 +170,7 @@ def _is_unix_file(self, path):
     def _is_url(self, path):
         return (
             re.search(
-                r"^http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+",
+                r"^http[s]?://(?:[a-zA-Z]|[0-9]|[-\$_\@\.\&+]|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+",
                 path,
             )
             is not None