diff --git a/Dockerfile b/Dockerfile
index 2c84082..3d27d0a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,6 +7,9 @@ WORKDIR /code
 
 RUN apt update && \
     apt install -y gettext nginx uwsgi uwsgi-plugin-python3 && \
+    apt install -y python3-django python3-django-crispy-forms \
+        python3-django-extensions python3-django-tables2 python3-docutils \
+        python3-psycopg2 && \
     rm -rf /var/lib/apt/lists/*
 
 COPY requirements.txt /code/
diff --git a/requirements.txt b/requirements.txt
index 21c2480..36faca7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,27 +1,8 @@
-certifi==2019.6.16
-chardet==3.0.4
-defusedxml==0.6.0
-Django~=2.2
-django-allauth==0.39.1
+Django>=3.2,<4.0
 django-autocomplete-light==3.5.1
 django-crispy-forms==1.7.2
 django-extensions==2.1.9
-django-filter==2.2.0
-django-guardian==2.1.0
-django-polymorphic==2.0.3
 djangorestframework==3.9.0
-django-rest-polymorphic==0.1.8
-django-reversion==3.0.3
 django-tables2==2.1.0
 docutils==0.14
 psycopg2==2.8.4
-idna==2.8
-oauthlib==3.1.0
-Pillow==6.1.0
-python3-openid==3.1.0
-pytz==2019.1
-requests==2.22.0
-requests-oauthlib==1.2.0
-six==1.12.0
-sqlparse==0.3.0
-urllib3==1.25.3
diff --git a/tombola/settings/base.py b/tombola/settings/base.py
index 530a765..6817057 100644
--- a/tombola/settings/base.py
+++ b/tombola/settings/base.py
@@ -32,14 +32,6 @@ ALLOWED_HOSTS = []
 # Application definition
 
 INSTALLED_APPS = [
-    # Theme overrides Django Admin templates
-    # 'theme',
-
-    # External apps
-    'polymorphic',
-    'reversion',
-    'crispy_forms',
-    'django_tables2',
     # Django contrib
     'django.contrib.admin',
     'django.contrib.admindocs',
@@ -55,6 +47,10 @@ INSTALLED_APPS = [
     # Autocomplete
     'dal',
     'dal_select2',
+    # External apps
+    'crispy_forms',
+    'django_tables2',
+    'django_extensions',
 
     # Tombola apps
     'tbde',