diff --git a/Procfile b/Procfile
index d457446..5884cc0 100644
--- a/Procfile
+++ b/Procfile
@@ -1 +1 @@
-web: voila --port=$PORT --no-browser --Voila.ip=0.0.0.0 dashboard/quickstart_voila.ipynb dashboard/favicon.ico
+web: voila --port=$PORT --no-browser --Voila.ip=0.0.0.0 dashboard/quickstart_voila.ipynb --VoilaConfiguration.file_whitelist="['favicon.ico']"