diff --git a/.circleci/config.yml b/.circleci/config.yml
index 3e5372dd8..c50f990f9 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -18,7 +18,7 @@ jobs:
           name: Linting Testing
           command: |
             cd litellm
-            python -m pip install types-requests types-setuptools types-redis
+            python -m pip install types-requests types-setuptools types-redis types-PyYAML
             if ! python -m mypy . --ignore-missing-imports; then
               echo "mypy detected errors"
               exit 1