diff --git a/gns3server/compute/docker/__init__.py b/gns3server/compute/docker/__init__.py
index 048d5e47..722f7e69 100644
--- a/gns3server/compute/docker/__init__.py
+++ b/gns3server/compute/docker/__init__.py
@@ -46,6 +46,7 @@ class Docker(BaseManager):
         self._connected = False
         # Allow locking during ubridge operations
         self.ubridge_lock = asyncio.Lock()
+        self._session = None
 
     @asyncio.coroutine
     def connector(self):
@@ -107,17 +108,16 @@ class Docker(BaseManager):
         data = json.dumps(data)
         url = "http://docker/" + path
         try:
-            session = aiohttp.ClientSession()
-            response = yield from session.request(
+            if self._session is None or self._session.closed is True:
+                self._session = aiohttp.ClientSession(connector=(yield from self.connector()))
+            response = yield from self._session.request(
                 method,
                 url,
-                connector=(yield from self.connector()),
                 params=params,
                 data=data,
                 headers={"content-type": "application/json", },
                 timeout=timeout
             )
-            yield from session.close()
         except (aiohttp.ClientResponseError, aiohttp.ClientOSError) as e:
             raise DockerError("Docker has returned an error: {}".format(str(e)))
         if response.status >= 300:
diff --git a/tests/compute/docker/test_docker.py b/tests/compute/docker/test_docker.py
index 100c4fcc..ee5de061 100644
--- a/tests/compute/docker/test_docker.py
+++ b/tests/compute/docker/test_docker.py
@@ -28,8 +28,6 @@ from gns3server.compute.docker.docker_error import DockerError
 def vm():
     vm = Docker()
     vm._connected = True
-    vm._connector = MagicMock()
-    vm._connector.closed = False
     return vm
 
 
@@ -48,7 +46,6 @@ def test_query_success(loop, vm):
         data = loop.run_until_complete(asyncio.async(vm.query("POST", "test", data={"a": True}, params={"b": 1})))
     mock.assert_called_with('POST',
                             'http://docker/test',
-                            connector=vm._connector,
                             data='{"a": true}',
                             headers={'content-type': 'application/json'},
                             params={'b': 1},
@@ -72,7 +69,6 @@ def test_query_error(loop, vm):
             data = loop.run_until_complete(asyncio.async(vm.query("POST", "test", data={"a": True}, params={"b": 1})))
     mock.assert_called_with('POST',
                             'http://docker/test',
-                            connector=vm._connector,
                             data='{"a": true}',
                             headers={'content-type': 'application/json'},
                             params={'b': 1},
@@ -94,7 +90,6 @@ def test_query_error_json(loop, vm):
             data = loop.run_until_complete(asyncio.async(vm.query("POST", "test", data={"a": True}, params={"b": 1})))
     mock.assert_called_with('POST',
                             'http://docker/test',
-                            connector=vm._connector,
                             data='{"a": true}',
                             headers={'content-type': 'application/json'},
                             params={'b': 1},