diff --git a/implementations/racket/preserves/preserves/tool.rkt b/implementations/racket/preserves/preserves/tool.rkt
index c44b27e..ee81c86 100644
--- a/implementations/racket/preserves/preserves/tool.rkt
+++ b/implementations/racket/preserves/preserves/tool.rkt
@@ -7,7 +7,7 @@
 (module+ main
   (require racket/cmdline)
   (define input-format 'any)
-  (define output-format 'binary)
+  (define output-format 'text)
   (define indent? #t)
   (define annotations? #t)
   (define count +inf.0)