diff --git a/githooks/pre-commit b/githooks/pre-commit
index 9f78ba4..e078da9 100755
--- a/githooks/pre-commit
+++ b/githooks/pre-commit
@@ -8,4 +8,4 @@ VERSION=$(grep version setup.cfg | sed 's/.*= *//')
 sed -i "s/^__version__ = .*/__version__ = '${VERSION}'/"  src/lmwsip/__init__.py
 git add src/lmwsip/__init__.py
 
-tox
+tox -p