add upgrade flag to dev requirements
diff --git a/.travis.yml b/.travis.yml index c699fbb..f7b0fed 100644 --- a/.travis.yml +++ b/.travis.yml
@@ -5,7 +5,7 @@ - '3.8' install: - pip install -r requirements.txt -- pip install -r dev_requirements.txt +- pip install -r dev_requirements.txt --upgrade - pip install coveralls script: - pytest --cov