diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 2456dfd..3615579 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -25,7 +25,7 @@ jobs:
     - name: install
       run: |
         python -m venv venv
-        source venv/bin/activate
+        . venv/bin/activate
         pip install .[cpu,test]
     - name: test-exodus
       run: |