diff --git a/melange-for-react-devs.opam b/melange-for-react-devs.opam
index eda2865..ee4c1cf 100644
--- a/melange-for-react-devs.opam
+++ b/melange-for-react-devs.opam
@@ -8,7 +8,7 @@ homepage: "https://github.com/melange-re/melange-for-react-devs"
 bug-reports: "https://github.com/melange-re/melange-for-react-devs"
 depends: [
   "ocaml" {>= "5.1.1"}
-  "reason" {>= "3.10.0"}
+  "reason" {>= "3.12.0" & < "3.13.0"}
   "dune" {>= "3.8"}
   "melange" {>= "4.0.0-51"}
   "reason-react" {>= "0.14.0"}