diff --git a/packages/js_of_ocaml/js_of_ocaml.3.3.0/opam b/packages/js_of_ocaml/js_of_ocaml.3.3.0/opam
index 649b36fc85b9..952061b16ada 100644
--- a/packages/js_of_ocaml/js_of_ocaml.3.3.0/opam
+++ b/packages/js_of_ocaml/js_of_ocaml.3.3.0/opam
@@ -17,7 +17,7 @@ depends: [
   "js_of_ocaml-compiler" {= version}
 ]
 conflicts: [
-  "ppx_tools_versioned"     {<= "5.0beta0"}
+  "ppx_tools_versioned"     {< "5.0"}
 ]
 
 synopsis: "Compiler from OCaml bytecode to Javascript"