diff --git a/packages/open-browser/default.nix b/packages/open-browser/default.nix
index b7c42339..0bdbe8f3 100644
--- a/packages/open-browser/default.nix
+++ b/packages/open-browser/default.nix
@@ -5,9 +5,12 @@
 python3.pkgs.buildPythonApplication rec {
   pname = "open-browser";
   version = "0.1";
+  format = "pyproject";
 
   src = ./.;
 
+  propagatedBuildInputs = with python3.pkgs; [ setuptools ];
+
   desktopItem = makeDesktopItem {
     categories = [
       "Application"
diff --git a/packages/open-browser/open-browser b/packages/open-browser/open_browser.py
similarity index 98%
rename from packages/open-browser/open-browser
rename to packages/open-browser/open_browser.py
index e9eeb4c2..26d01fd3 100755
--- a/packages/open-browser/open-browser
+++ b/packages/open-browser/open_browser.py
@@ -48,7 +48,7 @@ def get_url_map(config_path):
         return {}
 
 
-def main(argv):
+def main(argv = sys.argv):
     url = argv[-1]
     url_map = get_url_map(CONFIG_PATH)
     browser = get_browser_for_url(url, url_map)
diff --git a/packages/open-browser/pyproject.toml b/packages/open-browser/pyproject.toml
new file mode 100644
index 00000000..702f6744
--- /dev/null
+++ b/packages/open-browser/pyproject.toml
@@ -0,0 +1,12 @@
+[build-system]
+requires = ["setuptools>=61.0.0"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "open-browser"
+version = "0.1"
+description = "Open browser according to user preference"
+requires-python = ">=3.9"
+
+[project.scripts]
+open-browser = "open_browser:main"
diff --git a/packages/open-browser/setup.py b/packages/open-browser/setup.py
deleted file mode 100644
index 0cc6a5cc..00000000
--- a/packages/open-browser/setup.py
+++ /dev/null
@@ -1,8 +0,0 @@
-import setuptools
-
-setuptools.setup(
-    name="open-browser",
-    version="0.1",
-    description="Open browser according to user preference",
-    scripts=["open-browser"],
-)