diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
index a40a899..8533669 100644
--- a/.github/workflows/pythonpackage.yml
+++ b/.github/workflows/pythonpackage.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: windows-latest
     strategy:
       matrix:
-        python-version: [3.7, 3.8, 3.9, 3.10.6]
+        python-version: [3.7, 3.8, 3.9, 3.10.11]
 
     steps:
     - uses: actions/checkout@v2
diff --git a/setup.py b/setup.py
index e431612..fecbb9b 100644
--- a/setup.py
+++ b/setup.py
@@ -6,7 +6,7 @@
     long_description = f.read()
 
 setup(name='pywinsandbox',
-      version='1.3.0',
+      version='1.4.0',
       description=u"Python Utilities for Windows Sandbox",
       long_description=long_description,
       long_description_content_type='text/markdown',
diff --git a/winsandbox/config/config_genereator.py b/winsandbox/config/config_genereator.py
index 341292e..1afb44d 100644
--- a/winsandbox/config/config_genereator.py
+++ b/winsandbox/config/config_genereator.py
@@ -16,6 +16,8 @@ def _format_folder_mappers(folder_mappers, tag, text):
 
 
 def generate_config_file(config):
+    config.folder_mappers = list(filter(lambda m: m.path().exists(), config.folder_mappers))
+
     document, tag, text = yattag.Doc().tagtext()
 
     with tag('Configuration'):
diff --git a/winsandbox/session/online_session.py b/winsandbox/session/online_session.py
index 48df4f2..201d3ab 100644
--- a/winsandbox/session/online_session.py
+++ b/winsandbox/session/online_session.py
@@ -73,7 +73,11 @@ def _get_logon_script(self, server_address_path):
         remote_python_path = sys.executable.replace(str(PythonMapper().path()), str(
             shared_folder_path_in_sandbox(PythonMapper().path())))
 
-        remote_user_site_packages_path = shared_folder_path_in_sandbox(PythonUserSitePackagesMapper().path())
+        user_site_path = PythonUserSitePackagesMapper().path()
+        if user_site_path.exists():
+            remote_user_site_packages_path = shared_folder_path_in_sandbox(user_site_path)
+        else:
+            remote_user_site_packages_path = ''
 
         # Launch the target script.
         commands.append(r'{} {} --disable-firewall {} {}'.format(
@@ -119,7 +123,7 @@ def configure_sandbox(self):
         self.sandbox.config.logon_script = self._get_logon_script(self.server_address_path_in_sandbox)
         self.sandbox.config.folder_mappers.extend(extra_folder_mappers)
 
-    def connect_to_sandbox(self, timeout=30):
+    def connect_to_sandbox(self, timeout=60):
         """
         Connect to the sandbox sever.
         Waits for the creation of the shared server address file, and checks that it responds.
diff --git a/winsandbox/target.py b/winsandbox/target.py
index f0fd24d..2fdf4c5 100644
--- a/winsandbox/target.py
+++ b/winsandbox/target.py
@@ -16,13 +16,14 @@
 
 def enable_python_incoming_firewall():
     # Using `{sys.base_exec_prefix}\python.exe` instead of `sys.executable` to support venvs.
-    subprocess.run(
-        'netsh advfirewall firewall add rule name=AllowPythonServer '
-        'dir=in action=allow enable=yes program="{}\\python.exe"'.format(Path(sys.base_exec_prefix).resolve()),
-        check=True,
-        stdout=subprocess.DEVNULL,
-        stderr=subprocess.DEVNULL
-    )
+    for python_executable in ['python.exe', 'python3.exe']:
+        subprocess.run(
+            'netsh advfirewall firewall add rule name=AllowPythonServer '
+            'dir=in action=allow enable=yes program="{}\\{}"'.format(Path(sys.base_exec_prefix).resolve(), python_executable),
+            check=True,
+            stdout=subprocess.DEVNULL,
+            stderr=subprocess.DEVNULL
+        )
 
 
 def get_ip_address():
@@ -35,14 +36,17 @@ def main():
     parser.add_argument("address_path",
                         type=lambda p: Path(p))
     parser.add_argument("custom_user_site_packages",
-                        type=str)
+                        type=str,
+                        default='',
+                        nargs='?')
     parser.add_argument("--disable-firewall", '-f', default=False, action='store_true')
     args = parser.parse_args()
 
     if args.disable_firewall:
         enable_python_incoming_firewall()
 
-    site.addsitedir(args.custom_user_site_packages)
+    if args.custom_user_site_packages:
+        site.addsitedir(args.custom_user_site_packages)
 
     import rpyc.utils.server