diff --git a/pkgs/development/ocaml-modules/parmap/default.nix b/pkgs/development/ocaml-modules/parmap/default.nix
index d79999087dd8..521c1c406714 100644
--- a/pkgs/development/ocaml-modules/parmap/default.nix
+++ b/pkgs/development/ocaml-modules/parmap/default.nix
@@ -2,11 +2,11 @@
 
 buildDunePackage rec {
   pname = "parmap";
-  version = "1.2.3";
+  version = "1.2.4";
 
   src = fetchurl {
     url = "https://github.com/rdicosmo/${pname}/releases/download/${version}/${pname}-${version}.tbz";
-    sha256 = "1wg81slp453jci0gi0rzvdjx74110mlf1n5qpsmxic6fqsyz9d2v";
+    sha256 = "sha256-BTkSEjIK3CVNloJACFo6eQ6Ob9o/cdrA9xuv87NKas4=";
   };
 
   minimalOCamlVersion = "4.03";