diff --git a/web/web.go b/web/web.go
index 9fba6fc95..5cc23760a 100644
--- a/web/web.go
+++ b/web/web.go
@@ -481,7 +481,7 @@ func New(logger log.Logger, o *Options) *Handler {
 
 	router.Get("/-/healthy", func(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(http.StatusOK)
-		fmt.Fprint(w, o.AppName+" is Healthy.\n")
+		fmt.Fprintf(w, "%s is Healthy.\n", o.AppName)
 	})
 	router.Head("/-/healthy", func(w http.ResponseWriter, _ *http.Request) {
 		w.WriteHeader(http.StatusOK)