diff --git a/pkgs/development/python-modules/pex/default.nix b/pkgs/development/python-modules/pex/default.nix
index 8a95acc211d2..38073094b1d7 100644
--- a/pkgs/development/python-modules/pex/default.nix
+++ b/pkgs/development/python-modules/pex/default.nix
@@ -6,12 +6,12 @@
 
 buildPythonPackage rec {
   pname = "pex";
-  version = "2.1.55";
+  version = "2.1.56";
   format = "setuptools";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1f6b60b9c50996ec3476e36dddff34afa98dc2d68fa73ed121d3c41232df1379";
+    sha256 = "8dfb7ef551cc9d3d03a6e2dc1b1ba6183cd94f3cde7431836f017d60cc992d53";
   };
 
   nativeBuildInputs = [