diff --git a/server/cmd/marka-server/main.go b/server/cmd/marka-server/main.go
index 311a75f..7335c71 100644
--- a/server/cmd/marka-server/main.go
+++ b/server/cmd/marka-server/main.go
@@ -24,7 +24,7 @@ func main() {
 	var roots multi
 	flag.Var(&roots, "root", "repeatable; specify multiple -root flags")
 	addr := flag.String("addr", ":8080", "listen address")
-	playgroundRoot := flag.String("playground-root", "", "path to playground build directory")
+	playgroundRoot := flag.String("playground-root", "/app/playground", "path to playground build directory")
 	flag.Parse()
 
 	if *playgroundRoot != "" {