diff --git a/pkgs/development/python-modules/python-ptrace/default.nix b/pkgs/development/python-modules/python-ptrace/default.nix
index ad0a17da2ac8..e9fafd9b99a6 100644
--- a/pkgs/development/python-modules/python-ptrace/default.nix
+++ b/pkgs/development/python-modules/python-ptrace/default.nix
@@ -5,11 +5,11 @@
 
 buildPythonPackage rec {
   pname = "python-ptrace";
-  version = "0.9.3";
+  version = "0.9.4";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "019jlpya2d2b3vbg037hnj4z0f564r7ibygayda7bm7qbpw0sa4g";
+    sha256 = "9885e9003e4a99c90b3bca1be9306181c9b40a33fc6e17b81027709be5e5cb87";
   };
 
   # requires distorm, which is optionally