diff --git a/refl1d/webview/build_client.py b/refl1d/webview/build_client.py
index 00768c86..5ae63da6 100644
--- a/refl1d/webview/build_client.py
+++ b/refl1d/webview/build_client.py
@@ -25,6 +25,7 @@ def build_client(
     # link to the local version of bumps:
     if link_bumps:
         import bumps.webview
+
         bumps_path = Path(bumps.webview.__file__).parent / "client"
 
         # install the local version of bumps