diff --git a/pkgs/tools/security/knockpy/default.nix b/pkgs/tools/security/knockpy/default.nix
new file mode 100644
index 00000000000..89eda45322c
--- /dev/null
+++ b/pkgs/tools/security/knockpy/default.nix
@@ -0,0 +1,40 @@
+{ lib
+, fetchFromGitHub
+, python3
+}:
+
+python3.pkgs.buildPythonApplication rec {
+  pname = "knockpy";
+  version = "5.0.0";
+  disabled = python3.pythonOlder "3.6";
+
+  src = fetchFromGitHub {
+    owner = "guelfoweb";
+    repo = "knock";
+    rev = version;
+    sha256 = "1h7sibdxx8y53xm1wydyng418n4j6baiys257msq03cs04jlm7h9";
+  };
+
+  propagatedBuildInputs = with python3.pkgs; [
+    beautifulsoup4
+    colorama
+    requests
+  ];
+
+  postPatch = ''
+    # https://github.com/guelfoweb/knock/pull/95
+    substituteInPlace setup.py \
+      --replace "bs4" "beautifulsoup4"
+  '';
+
+  # Project has no tests
+  doCheck = false;
+  pythonImportsCheck = [ "knockpy" ];
+
+  meta = with lib; {
+    description = "Tool to scan subdomains";
+    homepage = "https://github.com/guelfoweb/knock";
+    license = with licenses; [ gpl3Only ];
+    maintainers = with maintainers; [ fab ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index d3adbd22ce9..94b6a644443 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -5766,6 +5766,8 @@ in
 
   knockknock = callPackage ../tools/security/knockknock { };
 
+  knockpy = callPackage ../tools/security/knockpy { };
+
   kore = callPackage ../development/web/kore { };
 
   krakenx = callPackage ../tools/system/krakenx { };