diff --git a/pkgs/development/ocaml-modules/dune-private-libs/default.nix b/pkgs/development/ocaml-modules/dune-private-libs/default.nix
index 6161bd1fe8e810..9eb253f02e5bdb 100644
--- a/pkgs/development/ocaml-modules/dune-private-libs/default.nix
+++ b/pkgs/development/ocaml-modules/dune-private-libs/default.nix
@@ -7,7 +7,7 @@ buildDunePackage rec {
 
   inherit (dune_2) src version;
 
-  minimumOCamlVersion = "4.07";
+  minimumOCamlVersion = "4.08";
 
   dontAddPrefix = true;
 
diff --git a/pkgs/development/tools/ocaml/dune/2.nix b/pkgs/development/tools/ocaml/dune/2.nix
index d785302ebb54ba..eac705294f3968 100644
--- a/pkgs/development/tools/ocaml/dune/2.nix
+++ b/pkgs/development/tools/ocaml/dune/2.nix
@@ -1,16 +1,16 @@
 { stdenv, fetchurl, ocaml, findlib }:
 
-if stdenv.lib.versionOlder ocaml.version "4.07"
+if stdenv.lib.versionOlder ocaml.version "4.08"
 then throw "dune is not available for OCaml ${ocaml.version}"
 else
 
 stdenv.mkDerivation rec {
   pname = "dune";
-  version = "2.6.2";
+  version = "2.7.0";
 
   src = fetchurl {
     url = "https://github.com/ocaml/dune/releases/download/${version}/dune-${version}.tbz";
-    sha256 = "1sc8ax198z42vhc3l6i04kknm9g44whifjivs19qgi3sybrw2vjg";
+    sha256 = "058wiyncczbmlfxj3cnwn5n68wkmbaf4mgjm2bkp2hffpn2wl5xl";
   };
 
   buildInputs = [ ocaml findlib ];
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 110bc986b80d77..eb9bfe4290ff85 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -220,7 +220,7 @@ let
     dune = callPackage ../development/tools/ocaml/dune { };
 
     dune_2 =
-      if lib.versionAtLeast ocaml.version "4.07"
+      if lib.versionAtLeast ocaml.version "4.08"
       then callPackage ../development/tools/ocaml/dune/2.nix { }
       else if lib.versionAtLeast ocaml.version "4.02"
       then pkgs.dune_2