diff --git a/pkgs/development/ocaml-modules/lwt_react/default.nix b/pkgs/development/ocaml-modules/lwt_react/default.nix
index c9d7bed9f6ae..b33f98fb80e8 100644
--- a/pkgs/development/ocaml-modules/lwt_react/default.nix
+++ b/pkgs/development/ocaml-modules/lwt_react/default.nix
@@ -8,15 +8,13 @@
 
 buildDunePackage {
   pname = "lwt_react";
-  version = "1.1.5";
-
-  useDune2 = true;
+  version = "1.2.0";
 
   src = fetchFromGitHub {
     owner = "ocsigen";
     repo = "lwt";
-    rev = "5.5.0";
-    sha256 = "sha256:1jbjz2rsz3j56k8vh5qlmm87hhkr250bs2m3dvpy9vsri8rkzj9z";
+    tag = "5.6.0";
+    hash = "sha256-DLQupCkZ14kOuSQatbb7j07I+jvvDCKpdlaR3rijT4s=";
   };
 
   nativeBuildInputs = [ cppo ];