diff --git a/terrarium/bi_ci/bi_ci/execute_mypy_multi.py b/terrarium/bi_ci/bi_ci/execute_mypy_multi.py
index 28d1af19b..68e838b25 100644
--- a/terrarium/bi_ci/bi_ci/execute_mypy_multi.py
+++ b/terrarium/bi_ci/bi_ci/execute_mypy_multi.py
@@ -3,7 +3,10 @@
 from pathlib import Path
 import subprocess
 import sys
-from typing import Optional, Iterable
+from typing import (
+    Iterable,
+    Optional,
+)
 
 import clize
 import tomlkit