diff --git a/.travis.yml b/.travis.yml
index 6609e3836..8040a675f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,7 +20,7 @@ install:
   - pip install jupyter
   - pip install atari_py>=0.1.1
   - pip install autopep8
-  - pip install hacking
+  - pip install "hacking<1.1"
   - pip install coveralls
   - python setup.py develop
   - python -c "import numpy; numpy.show_config()"