diff --git a/dune-project b/dune-project
index 18602dd..dc88aa6 100644
--- a/dune-project
+++ b/dune-project
@@ -30,7 +30,7 @@
   (ocaml
    (>= "5.1"))
   (melange
-   (>= "2.0.0"))
+   (>= "3.0.0"))
   (melange-jest :with-test)
   (reason
    (and
diff --git a/melange-json.opam b/melange-json.opam
index a0ee2bc..a400c0b 100644
--- a/melange-json.opam
+++ b/melange-json.opam
@@ -14,7 +14,7 @@ bug-reports: "https://github.com/melange-community/melange-json/issues"
 depends: [
   "dune" {>= "3.8"}
   "ocaml" {>= "5.1"}
-  "melange" {>= "2.0.0"}
+  "melange" {>= "3.0.0"}
   "melange-jest" {with-test}
   "reason" {>= "3.10.0" & with-test}
   "opam-check-npm-deps" {with-test}