diff --git a/dune-project b/dune-project
index 7d5e89e..30742d1 100644
--- a/dune-project
+++ b/dune-project
@@ -26,7 +26,9 @@
   brr-lwd
   yojson
   ppx_yojson_conv
-  (jsont (>= "0.1.1"))
+  bytesrw
+  (jsont
+   (>= "0.1.1"))
   ezjsonm
   json-data-encoding
   json-data-encoding-browser
diff --git a/ocamix.opam b/ocamix.opam
index 9abb44a..4dd8533 100644
--- a/ocamix.opam
+++ b/ocamix.opam
@@ -18,6 +18,7 @@ depends: [
   "brr-lwd"
   "yojson"
   "ppx_yojson_conv"
+  "bytesrw"
   "jsont" {>= "0.1.1"}
   "ezjsonm"
   "json-data-encoding"