diff --git a/appview/config/config.go b/appview/config/config.go
--- a/appview/config/config.go
+++ b/appview/config/config.go
@@ -47,7 +47,7 @@
 }
 
 type KnotMirrorConfig struct {
-	Url string `env:"URL, required"`
+	Url string `env:"URL, default=https://mirror.tangled.network"`
 }
 
 type JetstreamConfig struct {