diff --git a/gns3server/compute/docker/__init__.py b/gns3server/compute/docker/__init__.py
index 37506393..72a8b692 100644
--- a/gns3server/compute/docker/__init__.py
+++ b/gns3server/compute/docker/__init__.py
@@ -166,10 +166,10 @@ class Docker(BaseManager):
         """
 
         url = "http://docker/v" + DOCKER_MINIMUM_API_VERSION + "/" + path
-        connection = yield from aiohttp.ws_connect(url,
-                                                   connector=self.connector(),
-                                                   origin="http://docker",
-                                                   autoping=True)
+        connection = yield from self._session.ws_connect(url,
+                                                         connector=self.connector(),
+                                                         origin="http://docker",
+                                                         autoping=True)
         return connection
 
     @locked_coroutine