diff --git a/src/newsreader/news/collection/favicon.py b/src/newsreader/news/collection/favicon.py
index 639e7f6..1ca21e6 100644
--- a/src/newsreader/news/collection/favicon.py
+++ b/src/newsreader/news/collection/favicon.py
@@ -126,7 +126,7 @@ class FaviconCollector(Collector):
     feed_client, favicon_client = (FeedClient, FaviconClient)
     url_builder, favicon_builder = (WebsiteURLBuilder, FaviconBuilder)
 
-    def collect(self, rules=None):
+    def collect(self, rules=[]):
         streams = []
 
         with self.feed_client(rules=rules) as client: