diff --git a/pkgs/development/python-modules/optree/default.nix b/pkgs/development/python-modules/optree/default.nix
index a9eb9d9a3626..b20edf0023c6 100644
--- a/pkgs/development/python-modules/optree/default.nix
+++ b/pkgs/development/python-modules/optree/default.nix
@@ -12,7 +12,7 @@
 
 buildPythonPackage rec {
   pname = "optree";
-  version = "0.13.0";
+  version = "0.13.1";
   pyproject = true;
 
   disabled = pythonOlder "3.7";
@@ -21,7 +21,7 @@ buildPythonPackage rec {
     owner = "metaopt";
     repo = "optree";
     rev = "refs/tags/v${version}";
-    hash = "sha256-HuzfQ1arAF/DbJd9MF0jAxfzWvOHtAfkEMUF+aPfaII=";
+    hash = "sha256-/Y2pMpVPz4EXyWoW++K3FFf67Ym6yUs0ZQI4y0GVwmo=";
   };
 
   dontUseCmakeConfigure = true;