diff --git a/pkgs/development/ocaml-modules/ptime/default.nix b/pkgs/development/ocaml-modules/ptime/default.nix
index d2f85f823ae9..f21f05eeae5f 100644
--- a/pkgs/development/ocaml-modules/ptime/default.nix
+++ b/pkgs/development/ocaml-modules/ptime/default.nix
@@ -1,12 +1,12 @@
 { stdenv, fetchurl, ocaml, findlib, ocamlbuild, topkg, result, js_of_ocaml }:
 
 stdenv.mkDerivation rec {
-  version = "0.8.4";
+  version = "0.8.5";
   name = "ocaml${ocaml.version}-ptime-${version}";
 
   src = fetchurl {
     url = "https://erratique.ch/software/ptime/releases/ptime-${version}.tbz";
-    sha256 = "0z2snhda8bg136xkw2msw6k2dz84vb49p8bgzrxfs8mawdlk0kkg";
+    sha256 = "1fxq57xy1ajzfdnvv5zfm7ap2nf49znw5f9gbi4kb9vds942ij27";
   };
 
   buildInputs = [ ocaml findlib ocamlbuild topkg js_of_ocaml ];