diff --git a/sweep.yaml b/sweep.yaml
index 4f98c7279d..6db1a8e388 100644
--- a/sweep.yaml
+++ b/sweep.yaml
@@ -10,3 +10,8 @@ gha_enabled: True
 description: ''
 
 # Default Values: https://github.com/sweepai/sweep/blob/main/sweep.yaml
+sandbox:
+  enabled: true
+  image: "Python3"
+  install: "python -m venv venv; . venv/bin/activate; pip install black"
+  formatter: ". venv/bin/activate; black {files}"