diff --git a/.circleci/prepare.sh b/.circleci/prepare.sh
index 035cdde7..354c2d20 100644
--- a/.circleci/prepare.sh
+++ b/.circleci/prepare.sh
@@ -3,7 +3,8 @@ set -o xtrace
 
 $PYTHON --version
 $PYTHON -m pip --version
-$PYTHON -m pip install -q --user --ignore-installed virtualenv==20.0.23
+sudo $PYTHON -m pip uninstall -y poetry
+$PYTHON -m pip install --user --ignore-installed virtualenv==20.0.21
 $PYTHON -m virtualenv -p $PYTHON venv
 venv/bin/python -m pip install -r requirements-dev.txt
 venv/bin/python -m pip freeze