diff --git a/.travis.yml b/.travis.yml
index b40f204a18..ab38af9e31 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -30,11 +30,11 @@ matrix:
       env: JOB=tests PRETIX_CONFIG_FILE=tests/travis_postgres.cfg
     - python: 3.6
       env: JOB=tests PRETIX_CONFIG_FILE=tests/travis_postgres.cfg
-    - python: 3.4
+    - python: 3.6
       env: JOB=style
-    - python: 3.4
+    - python: 3.6
       env: JOB=plugins
-    - python: 3.4
+    - python: 3.6
       env: JOB=tests-cov
 addons:
   postgresql: "9.4"
diff --git a/src/setup.cfg b/src/setup.cfg
index a1d8f8d3f9..770d855f1d 100644
--- a/src/setup.cfg
+++ b/src/setup.cfg
@@ -10,7 +10,7 @@ default_section = THIRDPARTY
 include_trailing_comma = true
 known_first_party = pretix
 known_third_party = versions
-known_standard_library = typing
+known_standard_library = typing,enum
 multi_line_output = 5
 not_skip = __init__.py
 skip = make_testdata.py,wsgi.py,bootstrap,celery_app.py,settings.py