diff --git a/polytope_server/common/datasource/polytope.py b/polytope_server/common/datasource/polytope.py
index ffe2225..d5b387b 100644
--- a/polytope_server/common/datasource/polytope.py
+++ b/polytope_server/common/datasource/polytope.py
@@ -28,9 +28,10 @@
 import tempfile
 from pathlib import Path
 
-import polytope
 import yaml
 
+import polytope
+
 from ..caching import cache
 from . import datasource