diff --git a/gns3server/compute/docker/__init__.py b/gns3server/compute/docker/__init__.py
index 1a13d1af..ea2a63cd 100644
--- a/gns3server/compute/docker/__init__.py
+++ b/gns3server/compute/docker/__init__.py
@@ -111,7 +111,7 @@ class Docker(BaseManager):
         body = await response.read()
         response.close()
         if body and len(body):
-            if response.headers['CONTENT-TYPE'] == 'application/json':
+            if response.headers.get('CONTENT-TYPE') == 'application/json':
                 body = json.loads(body.decode("utf-8"))
             else:
                 body = body.decode("utf-8")
diff --git a/gns3server/compute/docker/docker_vm.py b/gns3server/compute/docker/docker_vm.py
index 940aeab6..b662e2e5 100644
--- a/gns3server/compute/docker/docker_vm.py
+++ b/gns3server/compute/docker/docker_vm.py
@@ -94,7 +94,7 @@ class DockerVM(BaseNode):
         self._console_websocket = None
         self._extra_hosts = extra_hosts
         self._extra_volumes = extra_volumes or []
-        self._permissions_fixed = False
+        self._permissions_fixed = True
         self._display = None
         self._closing = False