diff --git a/pkgs/development/ocaml-modules/posix/base.nix b/pkgs/development/ocaml-modules/posix/base.nix
index 449eb5736da2..7bdf8f0dd5a9 100644
--- a/pkgs/development/ocaml-modules/posix/base.nix
+++ b/pkgs/development/ocaml-modules/posix/base.nix
@@ -8,13 +8,13 @@
 
 buildDunePackage rec {
   pname = "posix-base";
-  version = "2.0.2";
+  version = "2.2.0";
 
   src = fetchFromGitHub {
     owner = "savonet";
     repo = "ocaml-posix";
     rev = "v${version}";
-    hash = "sha256-xxNaPJZdcW+KnT7rYUuC7ZgmHtXTppZG2BOmpKweC/U=";
+    hash = "sha256-JKJIiuo4lW8DmcK1mJlT22784J1NS2ig860jDbRIjIo=";
   };
 
   duneVersion = "3";