diff --git a/pkgs/development/python-modules/thespian/default.nix b/pkgs/development/python-modules/thespian/default.nix
index af3d24899c77..cd4a30f656ae 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 = "3.9.7";
+  version = "3.9.9";
   pname = "thespian";
 
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "fc968325894f812098f4fde4341c1734050bb1b742d8decf62ae9704c761f577";
+    sha256 = "c89e1973465feb88b694f3884d24723932a6b0e4df8d909f61e44ff371af7380";
   };
 
   # Do not run the test suite: it takes a long time and uses