diff --git a/apps/session/sparcsssov2.py b/apps/session/sparcsssov2.py
index bdad749ed..0c812a754 100644
--- a/apps/session/sparcsssov2.py
+++ b/apps/session/sparcsssov2.py
@@ -77,7 +77,7 @@ def _post_data(self, url, data):
         except Exception:
             raise RuntimeError('INVALID_OBJECT')
 
-    def get_login_params(self):
+    def get_login_params(self, preferred_url):
         """
         Get login parameters for SPARCS SSO login
         :returns: [url, state] where url is a url to redirect user,
@@ -87,6 +87,7 @@ def get_login_params(self):
         params = {
             'client_id': self.client_id,
             'state': state,
+            'preferred_url': preferred_url,
         }
         url = '?'.join([self.URLS['token_require'], urlencode(params)])
         return [url, state]
diff --git a/apps/session/views.py b/apps/session/views.py
index a65b51982..a7c1aff44 100644
--- a/apps/session/views.py
+++ b/apps/session/views.py
@@ -75,7 +75,9 @@ def user_login(request):
 
     social_login = request.GET.get("social_login", None)
 
-    login_url, state = sso_client.get_login_params()
+    http_host = request.META["HTTP_HOST"]
+    login_url, state = sso_client.get_login_params("https://"+http_host+"/session/login/callback/")
+    
     if social_login == '0':
         login_url += '&social_enabled=0&show_disabled_button=0'
     request.session["sso_state"] = state
diff --git a/docker/Dockerfile.back b/docker/Dockerfile.back
index 0548b4d83..135f1a85c 100644
--- a/docker/Dockerfile.back
+++ b/docker/Dockerfile.back
@@ -11,6 +11,8 @@ WORKDIR /var/www/otlplus
 ADD ./requirements.txt ./requirements.txt
 RUN pip install -r requirements.txt
 
+RUN pip install gevent
+
 ADD . .
 
 EXPOSE 8000
@@ -20,4 +22,4 @@ ADD ./volumes/key.pem /root/key.pem
 ADD ./volumes/wheel-2021.pem /root/wheel-2021.pem
 RUN chown -R root:root /root && chmod 400 /root/key.pem && chmod 400 /root/wheel-2021.pem && echo "StrictHostKeyChecking no" >> /etc/ssh_config
 
-CMD ["gunicorn", "otlplus.wsgi", "--bind", "0.0.0.0:8000"]
+CMD ["gunicorn", "otlplus.wsgi", "--bind", "0.0.0.0:8000", "--log-file", "-", "--workers", "6", "--threads", "12", "--worker-class", "gevent"]