diff --git a/opam b/opam
index 43e860fd..9bfabdfb 100644
--- a/opam
+++ b/opam
@@ -1,6 +1,6 @@
 opam-version: "1.2"
 name: "bistro"
-version: "0.0.0"
+version: "0.1.0"
 maintainer: "Philippe Veber <philippe.veber@gmail.com>"
 authors: "Philippe Veber <philippe.veber@gmail.com>"
 homepage: "https://github.com/pveber/bistro/"
@@ -25,4 +25,5 @@ depends: [
   "ppx_tools"
   "pvem"
   "rresult"
+  "sexplib" {< "113.24.00"}
 ]