diff --git a/repl-server.rkt b/repl-server.rkt
index a13b46d..5e44604 100644
--- a/repl-server.rkt
+++ b/repl-server.rkt
@@ -104,6 +104,8 @@
 		 (sandbox-input in)
 		 (sandbox-output out)
 		 (sandbox-error-output out)
+		 (sandbox-memory-limit 2) ;; megabytes
+		 (sandbox-eval-limits #f)
 		 (sandbox-namespace-specs (list (lambda () master-namespace))))
     (printf "Hello, ~a.\n" username)
     (printf "Type (help) for help.\n")