diff --git a/pkgs/development/ocaml-modules/oseq/default.nix b/pkgs/development/ocaml-modules/oseq/default.nix
index ee726be7130a..02b340275732 100644
--- a/pkgs/development/ocaml-modules/oseq/default.nix
+++ b/pkgs/development/ocaml-modules/oseq/default.nix
@@ -3,14 +3,14 @@
 }:
 
 buildDunePackage rec {
-  version = "0.5";
+  version = "0.5.1";
   pname = "oseq";
 
   src = fetchFromGitHub {
     owner = "c-cube";
     repo = pname;
     rev = "v${version}";
-    hash = "sha256-JMIcRyciNvLOE1Gpin7CpcDNSmGYFxZWsDN0X6D/NVI=";
+    hash = "sha256-fyr/OKlvvHBfovtdubSW4rd4OwQbMLKWXghyU3uBy/k=";
   };
 
   minimalOCamlVersion = "4.08";