diff --git a/pkgs/development/python-modules/cleo/default.nix b/pkgs/development/python-modules/cleo/default.nix
index f834ef198ca8..216065472bca 100644
--- a/pkgs/development/python-modules/cleo/default.nix
+++ b/pkgs/development/python-modules/cleo/default.nix
@@ -20,11 +20,6 @@ buildPythonPackage rec {
     hash = "sha256-y9PYlGSPLpZl9Ad2AFuDKIopH0LRETLp35aiZtLcXzM=";
   };
 
-  postPatch = ''
-    substituteInPlace pyproject.toml \
-      --replace 'crashtest = "^0.3.1"' 'crashtest = "*"'
-  '';
-
   nativeBuildInputs = [
     poetry-core
   ];