diff --git a/.travis.yml b/.travis.yml
index b8ba56e7..e73ca68a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -31,7 +31,7 @@ script:
  - python -m pytest src/Test --cov=src --cov-config src/Test/coverage.ini
  - mv plugins/disabled-Multiuser plugins/Multiuser && python -m pytest -x plugins/Multiuser/Test
  - mv plugins/disabled-Bootstrapper plugins/Bootstrapper && python -m pytest -x plugins/Bootstrapper/Test
- - flake8 . --count --select=E9,F63,F72,F82 --show-source --statistics
+ - flake8 . --count --select=E9,F63,F72,F82 --show-source --statistics --exclude=src/lib/pybitcointools/  
 after_success:
   - codecov
   - coveralls --rcfile=src/Test/coverage.ini