diff --git a/pkgs/development/python-modules/thespian/default.nix b/pkgs/development/python-modules/thespian/default.nix
index 0ced52c7ba10..c964a4ed2f10 100644
--- a/pkgs/development/python-modules/thespian/default.nix
+++ b/pkgs/development/python-modules/thespian/default.nix
@@ -1,13 +1,13 @@
 { fetchPypi, buildPythonPackage, lib }:
 
 buildPythonPackage rec {
-  version = "3.9.2";
+  version = "3.9.4";
   pname = "thespian";
 
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "aec9793fecf45bb91fe919dc61b5c48a4aadfb9f94b06cd92883df7952eacf95";
+    sha256 = "98766eb304ef922133baca12a75eedd8d9b709c58bd9af50bfa5593dc3ffe0e1";
   };
 
   # Do not run the test suite: it takes a long time and uses