diff --git a/racket/info.rkt b/racket/info.rkt
index 55c2a29..495436f 100644
--- a/racket/info.rkt
+++ b/racket/info.rkt
@@ -20,4 +20,5 @@
 	       ))
 (define build-deps '("racket-doc"
                      "scribble-lib"
+                     "sha"
                      "draw-doc" "gui-doc" "htdp-doc" "pict-doc"))