diff --git a/pkgs/development/ocaml-modules/irmin-watcher/default.nix b/pkgs/development/ocaml-modules/irmin-watcher/default.nix
index 82818b39492d..7304528b7dc5 100644
--- a/pkgs/development/ocaml-modules/irmin-watcher/default.nix
+++ b/pkgs/development/ocaml-modules/irmin-watcher/default.nix
@@ -4,13 +4,13 @@
 
 buildDunePackage rec {
   pname = "irmin-watcher";
-  version = "0.4.1";
+  version = "0.5.0";
 
   useDune2 = true;
 
   src = fetchurl {
     url = "https://github.com/mirage/irmin-watcher/releases/download/${version}/irmin-watcher-${version}.tbz";
-    sha256 = "00d4ph4jbsw6adp3zqdrwi099hfcf7p1xzi0685qr7bgcmandjfv";
+    sha256 = "sha256-vq4kwaz4QUG9x0fGEbQMAuDGjlT3/6lm8xiXTUqJmZM=";
   };
 
   propagatedBuildInputs = [ astring fmt logs ocaml_lwt ];