diff --git a/pkgs/tools/security/quark-engine/default.nix b/pkgs/tools/security/quark-engine/default.nix
index 24b0ecb763d2..12e226c1ede0 100644
--- a/pkgs/tools/security/quark-engine/default.nix
+++ b/pkgs/tools/security/quark-engine/default.nix
@@ -30,11 +30,6 @@ python3.pkgs.buildPythonApplication rec {
     tqdm
   ];
 
-  postPatch = ''
-    substituteInPlace setup.py \
-      --replace "prompt-toolkit==3.0.19" "prompt-toolkit>=3.0.19"
-  '';
-
   # Project has no tests
   doCheck = false;