diff --git a/cmd/tokidoki/main.go b/cmd/tokidoki/main.go
index bdadce5..9574bbc 100644
--- a/cmd/tokidoki/main.go
+++ b/cmd/tokidoki/main.go
@@ -34,7 +34,7 @@ func main() {
 	mux.Use(authProvider.Middleware())
 
 	backend := storage.NewPostgreSQL()
-	mux.Handle("/", &carddav.Handler{Backend: backend})
+	mux.Mount("/", &carddav.Handler{Backend: backend})
 
 	server := http.Server{
 		Addr:    addr,