diff --git a/docs/api/examples/get_vpcsuuid.txt b/docs/api/examples/get_vpcsuuid.txt
index 797f00bd..1abe5fd9 100644
--- a/docs/api/examples/get_vpcsuuid.txt
+++ b/docs/api/examples/get_vpcsuuid.txt
@@ -18,5 +18,5 @@ X-ROUTE: /vpcs/{uuid}
     "project_uuid": "a1e920ca-338a-4e9f-b363-aa607b09dd80",
     "script_file": null,
     "startup_script": null,
-    "uuid": "40f76457-de2b-4399-8853-a35393a72a2d"
+    "uuid": "f8155d67-c0bf-4229-be4c-97edaaae7b0b"
 }
diff --git a/docs/api/examples/post_vpcs.txt b/docs/api/examples/post_vpcs.txt
index 1977fc1d..26ee627f 100644
--- a/docs/api/examples/post_vpcs.txt
+++ b/docs/api/examples/post_vpcs.txt
@@ -21,5 +21,5 @@ X-ROUTE: /vpcs
     "project_uuid": "a1e920ca-338a-4e9f-b363-aa607b09dd80",
     "script_file": null,
     "startup_script": null,
-    "uuid": "a022aa0d-acab-4554-b2a6-6e6f51c9d65e"
+    "uuid": "5a9aac64-5b62-41bd-955a-fcef90a2fac5"
 }
diff --git a/gns3server/handlers/vpcs_handler.py b/gns3server/handlers/vpcs_handler.py
index df6788f7..633a668e 100644
--- a/gns3server/handlers/vpcs_handler.py
+++ b/gns3server/handlers/vpcs_handler.py
@@ -17,6 +17,7 @@
 
 from ..web.route import Route
 from ..schemas.vpcs import VPCS_CREATE_SCHEMA
+from ..schemas.vpcs import VPCS_UPDATE_SCHEMA
 from ..schemas.vpcs import VPCS_OBJECT_SCHEMA
 from ..schemas.vpcs import VPCS_NIO_SCHEMA
 from ..modules.vpcs import VPCS
@@ -67,6 +68,27 @@ class VPCSHandler:
         vm = vpcs_manager.get_vm(request.match_info["uuid"])
         response.json(vm)
 
+    @classmethod
+    @Route.put(
+        r"/vpcs/{uuid}",
+        status_codes={
+            200: "VPCS instance updated",
+            409: "Conflict"
+        },
+        description="Update a VPCS instance",
+        input=VPCS_UPDATE_SCHEMA,
+        output=VPCS_OBJECT_SCHEMA)
+    def update(request, response):
+
+        vpcs_manager = VPCS.instance()
+        vm = vpcs_manager.get_vm(request.match_info["uuid"])
+        vm.name = request.json.get("name", vm.name)
+        vm.console = request.json.get("console", vm.console)
+        vm.script_file = request.json.get("script_file", vm.script_file)
+        vm.startup_script = request.json.get("startup_script", vm.startup_script)
+
+        response.json(vm)
+
     @classmethod
     @Route.post(
         r"/vpcs/{uuid}/start",
diff --git a/gns3server/modules/base_vm.py b/gns3server/modules/base_vm.py
index e1e19d1d..c4531fba 100644
--- a/gns3server/modules/base_vm.py
+++ b/gns3server/modules/base_vm.py
@@ -59,6 +59,10 @@ class BaseVM:
         :param new_name: name
         """
 
+        log.info("{module} {name} [{uuid}]: renamed to {new_name}".format(module=self.module_name,
+                                                                          name=self._name,
+                                                                          uuid=self.uuid,
+                                                                          new_name=new_name))
         self._name = new_name
 
     @property
diff --git a/gns3server/modules/vpcs/vpcs_vm.py b/gns3server/modules/vpcs/vpcs_vm.py
index cabc6df4..df7dc5fc 100644
--- a/gns3server/modules/vpcs/vpcs_vm.py
+++ b/gns3server/modules/vpcs/vpcs_vm.py
@@ -123,7 +123,17 @@ class VPCSVM(BaseVM):
 
         return self._console
 
-    # FIXME: correct way to subclass a property?
+    @console.setter
+    def console(self, console):
+        """
+        Change console port
+
+        :params console: Console port (integer)
+        """
+        if self._console:
+            self._manager.port_manager.release_console_port(self._console)
+        self._console = self._manager.port_manager.reserve_console_port(console)
+
     @BaseVM.name.setter
     def name(self, new_name):
         """
@@ -133,22 +143,11 @@ class VPCSVM(BaseVM):
         """
 
         if self._script_file:
-            # update the startup.vpc
-            config_path = os.path.join(self.working_dir, "startup.vpc")
-            if os.path.isfile(config_path):
-                try:
-                    with open(config_path, "r+", errors="replace") as f:
-                        old_config = f.read()
-                        new_config = old_config.replace(self._name, new_name)
-                        f.seek(0)
-                        f.write(new_config)
-                except OSError as e:
-                    raise VPCSError("Could not amend the configuration {}: {}".format(config_path, e))
+            content = self.startup_script
+            content = content.replace(self._name, new_name)
+            self.startup_script = content
 
-        log.info("VPCS {name} [{uuid}]: renamed to {new_name}".format(name=self._name,
-                                                                      uuid=self.uuid,
-                                                                      new_name=new_name))
-        BaseVM.name = new_name
+        super(VPCSVM, VPCSVM).name.__set__(self, new_name)
 
     @property
     def startup_script(self):
@@ -173,7 +172,10 @@ class VPCSVM(BaseVM):
             self._script_file = os.path.join(self.working_dir, 'startup.vpcs')
         try:
             with open(self._script_file, '+w') as f:
-                f.write(startup_script)
+                if startup_script is None:
+                    f.write('')
+                else:
+                    f.write(startup_script)
         except OSError as e:
             raise VPCSError("Can't write VPCS startup file '{}'".format(self._script_file))
 
diff --git a/gns3server/schemas/vpcs.py b/gns3server/schemas/vpcs.py
index a0190ee6..437651bb 100644
--- a/gns3server/schemas/vpcs.py
+++ b/gns3server/schemas/vpcs.py
@@ -63,6 +63,33 @@ VPCS_CREATE_SCHEMA = {
     "required": ["name", "project_uuid"]
 }
 
+VPCS_UPDATE_SCHEMA = {
+    "$schema": "http://json-schema.org/draft-04/schema#",
+    "description": "Request validation to update a VPCS instance",
+    "type": "object",
+    "properties": {
+        "name": {
+            "description": "VPCS device name",
+            "type": ["string", "null"],
+            "minLength": 1,
+        },
+        "console": {
+            "description": "console TCP port",
+            "minimum": 1,
+            "maximum": 65535,
+            "type": ["integer", "null"]
+        },
+        "script_file": {
+            "description": "VPCS startup script",
+            "type": ["string", "null"]
+        },
+        "startup_script": {
+            "description": "Content of the VPCS startup script",
+            "type": ["string", "null"]
+        },
+    },
+    "additionalProperties": False,
+}
 
 VPCS_NIO_SCHEMA = {
     "$schema": "http://json-schema.org/draft-04/schema#",
diff --git a/tests/api/base.py b/tests/api/base.py
index 6de05b45..4664f41a 100644
--- a/tests/api/base.py
+++ b/tests/api/base.py
@@ -45,6 +45,9 @@ class Query:
     def post(self, path, body={}, **kwargs):
         return self._fetch("POST", path, body, **kwargs)
 
+    def put(self, path, body={}, **kwargs):
+        return self._fetch("PUT", path, body, **kwargs)
+
     def get(self, path, **kwargs):
         return self._fetch("GET", path, **kwargs)
 
@@ -147,11 +150,10 @@ def loop(request):
 
 
 @pytest.fixture(scope="session")
-def server(request, loop):
+def server(request, loop, port_manager):
     port = _get_unused_port()
     host = "localhost"
     app = web.Application()
-    port_manager = PortManager("127.0.0.1", False)
     for method, route, handler in Route.get_routes():
         app.router.add_route(method, route, handler)
     for module in MODULES:
diff --git a/tests/api/test_project.py b/tests/api/test_project.py
index cf2297c0..b7ae8b55 100644
--- a/tests/api/test_project.py
+++ b/tests/api/test_project.py
@@ -20,7 +20,7 @@ This test suite check /project endpoint
 """
 
 
-from tests.utils import asyncio_patch
+from tests.utils import asyncio_patch, port_manager
 from tests.api.base import server, loop
 from gns3server.version import __version__
 
diff --git a/tests/api/test_version.py b/tests/api/test_version.py
index 110f7b1a..5b479006 100644
--- a/tests/api/test_version.py
+++ b/tests/api/test_version.py
@@ -20,7 +20,7 @@ This test suite check /version endpoint
 It's also used for unittest the HTTP implementation.
 """
 
-from tests.utils import asyncio_patch
+from tests.utils import asyncio_patch, port_manager
 from tests.api.base import server, loop
 from gns3server.version import __version__
 
diff --git a/tests/api/test_virtualbox.py b/tests/api/test_virtualbox.py
index c7b8856c..3d9e56c3 100644
--- a/tests/api/test_virtualbox.py
+++ b/tests/api/test_virtualbox.py
@@ -16,7 +16,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from tests.api.base import server, loop, project
-from tests.utils import asyncio_patch
+from tests.utils import asyncio_patch, port_manager
 from gns3server.modules.virtualbox.virtualbox_vm import VirtualBoxVM
 
 
diff --git a/tests/api/test_vpcs.py b/tests/api/test_vpcs.py
index 0b24753f..56b5bc56 100644
--- a/tests/api/test_vpcs.py
+++ b/tests/api/test_vpcs.py
@@ -18,7 +18,7 @@
 import pytest
 import os
 from tests.api.base import server, loop, project
-from tests.utils import asyncio_patch
+from tests.utils import asyncio_patch, free_console_port, port_manager
 from unittest.mock import patch, Mock
 from gns3server.modules.vpcs.vpcs_vm import VPCSVM
 
@@ -68,13 +68,13 @@ def test_vpcs_create_startup_script(server, project):
     assert response.json["startup_script"] == "ip 192.168.1.2\necho TEST"
 
 
-def test_vpcs_create_port(server, project):
-    response = server.post("/vpcs", {"name": "PC TEST 1", "project_uuid": project.uuid, "console": 4242})
+def test_vpcs_create_port(server, project, free_console_port):
+    response = server.post("/vpcs", {"name": "PC TEST 1", "project_uuid": project.uuid, "console": free_console_port})
     assert response.status == 200
     assert response.route == "/vpcs"
     assert response.json["name"] == "PC TEST 1"
     assert response.json["project_uuid"] == project.uuid
-    assert response.json["console"] == 4242
+    assert response.json["console"] == free_console_port
 
 
 def test_vpcs_nio_create_udp(server, vm):
@@ -119,3 +119,18 @@ def test_vpcs_stop(server, vm):
         response = server.post("/vpcs/{}/stop".format(vm["uuid"]))
         assert mock.called
         assert response.status == 200
+
+
+def test_vpcs_update(server, vm, tmpdir, free_console_port):
+    path = os.path.join(str(tmpdir), 'startup2.vpcs')
+    with open(path, 'w+') as f:
+        f.write(path)
+    response = server.put("/vpcs/{}".format(vm["uuid"]), {"name": "test",
+                                                          "console": free_console_port,
+                                                          "script_file": path,
+                                                          "startup_script": "ip 192.168.1.1"})
+    assert response.status == 200
+    assert response.json["name"] == "test"
+    assert response.json["console"] == free_console_port
+    assert response.json["script_file"] == path
+    assert response.json["startup_script"] == "ip 192.168.1.1"
diff --git a/tests/modules/vpcs/test_vpcs_vm.py b/tests/modules/vpcs/test_vpcs_vm.py
index a26b99b9..1cd27646 100644
--- a/tests/modules/vpcs/test_vpcs_vm.py
+++ b/tests/modules/vpcs/test_vpcs_vm.py
@@ -18,7 +18,7 @@
 import pytest
 import asyncio
 import os
-from tests.utils import asyncio_patch
+from tests.utils import asyncio_patch, port_manager, free_console_port
 
 # TODO: Move loop to util
 from tests.api.base import loop, project
@@ -136,3 +136,28 @@ def test_get_startup_script(vm):
     content = "echo GNS3 VPCS\nip 192.168.1.2\n"
     vm.startup_script = content
     assert vm.startup_script == content
+
+
+def test_change_console_port(vm, free_console_port):
+    vm.console = free_console_port
+    vm.console = free_console_port + 1
+    assert vm.console == free_console_port
+    PortManager.instance().reserve_console_port(free_console_port + 1)
+
+
+def test_change_name(vm, tmpdir):
+    path = os.path.join(str(tmpdir), 'startup.vpcs')
+    vm.name = "world"
+    with open(path, 'w+') as f:
+        f.write("name world")
+    vm.script_file = path
+    vm.name = "hello"
+    assert vm.name == "hello"
+    with open(path) as f:
+        assert f.read() == "name hello"
+
+
+def test_change_script_file(vm, tmpdir):
+    path = os.path.join(str(tmpdir), 'startup2.vpcs')
+    vm.script_file = path
+    assert vm.script_file == path
diff --git a/tests/utils.py b/tests/utils.py
index bc8dc5dc..55069f5e 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -16,7 +16,10 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import asyncio
+import pytest
 from unittest.mock import patch
+from gns3server.modules.project_manager import ProjectManager
+from gns3server.modules.port_manager import PortManager
 
 
 class _asyncio_patch:
@@ -54,3 +57,18 @@ class _asyncio_patch:
 
 def asyncio_patch(function, *args, **kwargs):
     return _asyncio_patch(function, *args, **kwargs)
+
+
+@pytest.fixture(scope="session")
+def port_manager():
+    return PortManager("127.0.0.1", False)
+
+
+@pytest.fixture(scope="function")
+def free_console_port(request, port_manager):
+    # In case of already use ports we will raise an exception
+    port = port_manager.get_free_console_port()
+    # We release the port immediately in order to allow
+    # the test do whatever the test want
+    port_manager.release_console_port(port)
+    return port