diff --git a/pkgs/development/ocaml-modules/yojson/default.nix b/pkgs/development/ocaml-modules/yojson/default.nix
index a6f30ab86694..a66189c69494 100644
--- a/pkgs/development/ocaml-modules/yojson/default.nix
+++ b/pkgs/development/ocaml-modules/yojson/default.nix
@@ -2,11 +2,11 @@
 
 buildDunePackage rec {
   pname = "yojson";
-  version = "2.2.0";
+  version = "2.2.1";
 
   src = fetchurl {
     url = "https://github.com/ocaml-community/yojson/releases/download/${version}/yojson-${version}.tbz";
-    hash = "sha256-v9wzvvMUG7qaj6ZqiFtUsp9r+rRQBAiE3Yz3zex4RRk=";
+    hash = "sha256-zTwdlPaViZoCbf9yaWmJvbENwWMpNLucvm9FmNSvptQ=";
   };
 
   propagatedBuildInputs = [ seq ];