diff --git a/.circleci/config.yml b/.circleci/config.yml
index 7e65eee..be97210 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -143,7 +143,7 @@ jobs:
     steps:
       - restore_project_workspace
       - restore_pip_cache
-      - run: pip install tox==4.4.4
+      - run: pip install tox==3.28.0
       - run: tox
 
 workflows: