diff --git a/.travis.yml b/.travis.yml
index 783f7d36..5937b890 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,26 +1,30 @@
+sudo: required
 group: stable
 dist: xenial
 os: linux
 language: python
+services:
+  - docker
 python:
-- '2.7'
-- '3.5'
-- '3.6'
-- '3.7'
+  - '2.7'
+  - '3.5'
+  - '3.6'
+  - '3.7'
 before_install:
-- sudo apt-get -qq update
+  - sudo apt-get -qq update
 install: pip install -r requirements.txt
 before_script:
-    - pip install flake8 flake8-import-order
-    # stop the build if there are Python syntax errors or undefined names
-    - flake8 --count --application-import-names cowrie --max-line-length=120 --statistics .
-script: PYTHONPATH=${TRAVIS_BUILD_DIR}/src trial cowrie
+  - pip install flake8 flake8-import-order
+  # stop the build if there are Python syntax errors or undefined names
+  - flake8 --count --application-import-names cowrie --max-line-length=120 --statistics .
+script:
+  -  PYTHONPATH=${TRAVIS_BUILD_DIR}/src trial cowrie
 notifications:
   email: false
   slack:
     secure: 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
 matrix:
   allow_failures:
-  - python: '3.5'
-  - python: '3.6'
-  - python: '3.7'
+    - python: '3.5'
+    - python: '3.6'
+    - python: '3.7'