diff --git a/pkgs/development/ocaml-modules/iso8601/default.nix b/pkgs/development/ocaml-modules/iso8601/default.nix
index ff9ce94bbbd4..5c6d4104b6a3 100644
--- a/pkgs/development/ocaml-modules/iso8601/default.nix
+++ b/pkgs/development/ocaml-modules/iso8601/default.nix
@@ -2,13 +2,13 @@
 
 stdenv.mkDerivation rec {
   pname = "ocaml-iso8601";
-  version = "0.2.4";
+  version = "0.2.5";
 
   src = fetchFromGitHub {
     owner = "sagotch";
     repo = "ISO8601.ml";
     rev = version;
-    sha256 = "sha256-sXnYAJcU88797orzzfbA2XG91Lk8mDV677J1Am5o7Xo=";
+    sha256 = "sha256-QWjZ+2AjvXnnRVenbyCG/hSjfW53bHiftQUtWpK/7I8=";
   };
 
   nativeBuildInputs = [ ocaml findlib ocamlbuild ];