diff --git a/ppx_sexp_conv.opam b/ppx_sexp_conv.opam
index e08695b..06fd03e 100644
--- a/ppx_sexp_conv.opam
+++ b/ppx_sexp_conv.opam
@@ -1,4 +1,5 @@
 opam-version: "2.0"
+version: "v0.14.0"
 maintainer: "opensource@janestreet.com"
 authors: ["Jane Street Group, LLC <opensource@janestreet.com>"]
 homepage: "https://github.com/janestreet/ppx_sexp_conv"
@@ -10,9 +11,9 @@ build: [
   ["dune" "build" "-p" name "-j" jobs]
 ]
 depends: [
-  "ocaml" {>= "4.04.2"}
-  "base"
-  "sexplib0"
+  "ocaml"    {>= "4.04.2"}
+  "base"     {>= "v0.14" & < "v0.15"}
+  "sexplib0" {>= "v0.14" & < "v0.15"}
   "dune"     {>= "2.0.0"}
   "ppxlib"   {>= "0.11.0"}
 ]