diff --git a/.travis.yml b/.travis.yml
index ebd567f..0120534 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,6 +10,7 @@ matrix:
 
 
 before_install:
+  - pip freeze | xargs pip uninstall -y
   - curl -sSL https://raw.githubusercontent.com/sdispater/poetry/master/get-poetry.py | python
   - source "$HOME/.poetry/env"