diff --git a/pkgs/development/ocaml-modules/argon2/default.nix b/pkgs/development/ocaml-modules/argon2/default.nix
new file mode 100644
index 000000000000..0690ce740d3b
--- /dev/null
+++ b/pkgs/development/ocaml-modules/argon2/default.nix
@@ -0,0 +1,40 @@
+{
+  lib,
+  fetchurl,
+  ctypes,
+  ctypes-foreign,
+  dune-configurator,
+  result,
+  libargon2,
+  buildDunePackage,
+}:
+
+buildDunePackage rec {
+  pname = "argon2";
+  version = "1.0.2";
+
+  minimalOCamlVersion = "4.02.3";
+
+  src = fetchurl {
+    url = "https://github.com/Khady/ocaml-argon2/releases/download/${version}/argon2-${version}.tbz";
+    hash = "sha256-NDsOV4kPT2SnSfNHDBAK+VKZgHDIKxW+dNJ/C5bQ8gU=";
+  };
+
+  buildInputs = [
+    dune-configurator
+  ];
+
+  propagatedBuildInputs = [
+    ctypes
+    ctypes-foreign
+    libargon2
+    result
+  ];
+
+  meta = {
+    homepage = "https://github.com/Khady/ocaml-argon2";
+    description = "Ocaml bindings to Argon2";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ naora ];
+  };
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 60b0c32f3b75..5ccb767f9f93 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -46,6 +46,8 @@ let
 
         apron = callPackage ../development/ocaml-modules/apron { };
 
+        argon2 = callPackage ../development/ocaml-modules/argon2 { };
+
         arg-complete = callPackage ../development/ocaml-modules/arg-complete { };
 
         arp = callPackage ../development/ocaml-modules/arp { };