diff --git a/pkgs/development/python-modules/proxy_tools/default.nix b/pkgs/development/python-modules/proxy_tools/default.nix
new file mode 100644
index 000000000000..e4596956dda8
--- /dev/null
+++ b/pkgs/development/python-modules/proxy_tools/default.nix
@@ -0,0 +1,25 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+}:
+
+buildPythonPackage rec {
+  pname = "proxy_tools";
+  version = "0.1.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-zLN1H1KcBH4tilhEDYayBTA88P6BRveE0cvNlPCigBA=";
+  };
+
+  # no tests in pypi
+  doCheck = false;
+  pythonImportsCheck = [ "proxy_tools" ];
+
+  meta = with lib; {
+    homepage = "https://github.com/jtushman/proxy_tools";
+    description = "Simple (hopefuly useful) Proxy (as in the GoF design pattern) implementation for Python";
+    license = licenses.bsd2;
+    maintainers = with maintainers; [ jojosch ];
+  };
+}
diff --git a/pkgs/development/python-modules/pywebview/default.nix b/pkgs/development/python-modules/pywebview/default.nix
index e750f234faf5..67f11ed291f5 100644
--- a/pkgs/development/python-modules/pywebview/default.nix
+++ b/pkgs/development/python-modules/pywebview/default.nix
@@ -7,18 +7,19 @@
 , pythonOlder
 , qt5
 , xvfb-run
+, proxy_tools
 }:
 
 buildPythonPackage rec {
   pname = "pywebview";
-  version = "3.4";
+  version = "3.5";
   disabled = pythonOlder "3.5";
 
   src = fetchFromGitHub {
     owner = "r0x0r";
     repo = "pywebview";
     rev = version;
-    sha256 = "sha256-3JHwtw8oReolEl4k8cdt7GCVGNkfWWJN6EnZYHxzDO8=";
+    sha256 = "sha256-+At/ToEylSPcLh/u2NHVTXQpMnw+2/afsevg5YAX/4c=";
   };
 
   nativeBuildInputs = [
@@ -27,6 +28,7 @@ buildPythonPackage rec {
 
   propagatedBuildInputs = [
     pyqtwebengine
+    proxy_tools
   ] ++ lib.optionals (pythonOlder "3.7") [ importlib-resources ];
 
   checkInputs = [
@@ -52,6 +54,8 @@ buildPythonPackage rec {
     popd
   '';
 
+  pythonImportsCheck = [ "webview" ];
+
   meta = with lib; {
     homepage = "https://github.com/r0x0r/pywebview";
     description = "Lightweight cross-platform wrapper around a webview";
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 000fcdc2d440..37fbc43d1a15 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -5877,6 +5877,8 @@ in {
 
   ppdeep = callPackage ../development/python-modules/ppdeep { };
 
+  proxy_tools = callPackage ../development/python-modules/proxy_tools { };
+
   pyaehw4a1 = callPackage ../development/python-modules/pyaehw4a1 { };
 
   pyatag = callPackage ../development/python-modules/pyatag { };