diff --git a/pitfall/pitfall/png.rkt b/pitfall/pitfall/png.rkt
index 59dd556a..216f9aae 100644
--- a/pitfall/pitfall/png.rkt
+++ b/pitfall/pitfall/png.rkt
@@ -3,7 +3,6 @@
   racket/class
   racket/contract
   racket/draw
-  racket/promise
   sugar/unstable/class
   sugar/unstable/js
   sugar/unstable/dict