diff --git a/gns3/http_client.py b/gns3/http_client.py
index c2157411..9ab28a14 100644
--- a/gns3/http_client.py
+++ b/gns3/http_client.py
@@ -235,6 +235,7 @@ class HTTPClient:
                 callback(params, error=True)
             else:
                 callback(params)
+        response.deleteLater()
 
     def dump(self):
         """
diff --git a/setup.py b/setup.py
index f6a322eb..6c1e2ea3 100644
--- a/setup.py
+++ b/setup.py
@@ -45,7 +45,6 @@ setup(
     description="GNS3 graphical interface for the GNS3 server.",
     long_description=open("README.rst", "r").read(),
     install_requires=[
-        "ws4py>=0.3.4",
         "apache-libcloud>=0.14.1",
         "requests",
         "paramiko",