diff --git a/core.opam b/core.opam
index 05070d7d..6588c41f 100644
--- a/core.opam
+++ b/core.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/core"
@@ -10,12 +11,12 @@ build: [
   ["dune" "build" "-p" name "-j" jobs]
 ]
 depends: [
-  "ocaml" {>= "4.08.0"}
-  "core_kernel"
-  "jst-config"
-  "ppx_jane"
-  "sexplib"
-  "timezone"
+  "ocaml"        {>= "4.08.0"}
+  "core_kernel"  {>= "v0.14" & < "v0.15"}
+  "jst-config"   {>= "v0.14" & < "v0.15"}
+  "ppx_jane"     {>= "v0.14" & < "v0.15"}
+  "sexplib"      {>= "v0.14" & < "v0.15"}
+  "timezone"     {>= "v0.14" & < "v0.15"}
   "base-threads"
   "dune"         {>= "2.0.0"}
   "spawn"        {>= "v0.12"}