diff --git a/.travis.yml b/.travis.yml
index 97bc3f50..e7b34ee1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -34,7 +34,6 @@ before_install:
   - if [[ $TRAVIS_OS_NAME == "osx" ]]; then source venv/bin/activate; fi
   - pip install -U pip
   - pip install -U coveralls
-  - pip install -U flake8
 install:
   - pip install -Ur requirements.txt
   - python setup.py develop
diff --git a/README.md b/README.md
index 07445c32..b002faf5 100644
--- a/README.md
+++ b/README.md
@@ -370,6 +370,12 @@ pip install -r requirements.txt
 python setup.py develop
 ```
 
+Run code style checks:
+
+```bash
+flake8
+```
+
 Run unit tests:
 
 ```bash
diff --git a/requirements.txt b/requirements.txt
index ca9a8cc8..c450e437 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,5 @@
 pip
+flake8
 pytest
 mock
 pytest-mock