diff --git a/Dockerfile.dev b/Dockerfile.dev
index c038686..3fb5af7 100644
--- a/Dockerfile.dev
+++ b/Dockerfile.dev
@@ -13,6 +13,6 @@ ENV PYTHONUNBUFFERED=1 \
 
 COPY . /srv/
 
-RUN pip install django-filter~=2.2.0 psycopg2-binary~=2.8.0  -e .
+RUN pip install django-filter~=21.0 psycopg2-binary~=2.8.0  -e .
 
 CMD [ "django-admin" , "runserver", "0.0.0.0:8080"]
\ No newline at end of file
diff --git a/runtests.py b/runtests.py
index 828a422..90ab961 100755
--- a/runtests.py
+++ b/runtests.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 import os
 import shutil
 import sys
@@ -15,4 +16,4 @@ def run():
 
 
 if __name__ == '__main__':
-    run()
\ No newline at end of file
+    run()
diff --git a/tests/app/settings.py b/tests/app/settings.py
index e20d09a..ff496f2 100644
--- a/tests/app/settings.py
+++ b/tests/app/settings.py
@@ -60,8 +60,6 @@ MIDDLEWARE = [
     'django.contrib.auth.middleware.AuthenticationMiddleware',
     'django.contrib.messages.middleware.MessageMiddleware',
     'django.middleware.clickjacking.XFrameOptionsMiddleware',
-
-    'wagtail.core.middleware.SiteMiddleware',
 ]
 
 TEMPLATES = [