diff --git a/.circleci/config.yml b/.circleci/config.yml
index 0f528a33d..85f2eebae 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -144,6 +144,7 @@ jobs:
           name: Install dependencies
           command: |
             brew install python@<< parameters.python_version >>
+            brew install openmpi
             python<< parameters.python_version >> -m venv env
             source env/bin/activate
             pip install --upgrade pip