diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 598569460..37ffdace5 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -3,7 +3,7 @@ before_script:
   - "python3 -m pip install -U virtualenv"
   - "virtualenv env"
   - "source env/bin/activate"
-  - "pip3 install -U -r requirements.txt -r requirements-dev.txt"
+  - "pip3 install -U -r requirements-dev.txt"
 stages:
   - test
   - build
diff --git a/passbook/core/requirements.txt b/passbook/core/requirements.txt
index 7c216f804..c8d507efe 100644
--- a/passbook/core/requirements.txt
+++ b/passbook/core/requirements.txt
@@ -8,4 +8,5 @@ markdown
 colorlog
 celery
 redis<3.0
-pymysql
\ No newline at end of file
+pymysql
+idna<2.8,>=2.5
diff --git a/passbook/oauth_client/views/core.py b/passbook/oauth_client/views/core.py
index d0892c4c6..10f915e37 100644
--- a/passbook/oauth_client/views/core.py
+++ b/passbook/oauth_client/views/core.py
@@ -146,7 +146,6 @@ class OAuthCallback(OAuthClientMixin, View):
         "Return url to redirect authenticated users."
         return 'overview'
 
-    # pylint: disable=unused-argument
     def get_or_create_user(self, source, access, info):
         "Create a shell auth.User."
         raise NotImplementedError()