diff --git a/pkgs/development/tools/ocaml/dune/3.nix b/pkgs/development/tools/ocaml/dune/3.nix
index a43c88671f85..de661948b9c3 100644
--- a/pkgs/development/tools/ocaml/dune/3.nix
+++ b/pkgs/development/tools/ocaml/dune/3.nix
@@ -6,11 +6,11 @@ else
 
 stdenv.mkDerivation rec {
   pname = "dune";
-  version = "3.1.0";
+  version = "3.1.1";
 
   src = fetchurl {
     url = "https://github.com/ocaml/dune/releases/download/${version}/fiber-${version}.tbz";
-    sha256 = "sha256-B31SCwhFxW4Q7FhW18ZuvnofG+pKMCfRgvRLJSlRnYE=";
+    sha256 = "sha256-AkhEVKsbmYhAx4c1CexrIwHrkmYsEy749fT1abNaa2A=";
   };
 
   nativeBuildInputs = [ ocaml findlib ];