diff --git a/src/divine_invitation_engine_V2.py b/src/divine_invitation_engine_V2.py
index 42cf646..45e95f0 100644
--- a/src/divine_invitation_engine_V2.py
+++ b/src/divine_invitation_engine_V2.py
@@ -257,9 +257,10 @@ def _build_complete_vocabulary(self) -> None:
 
         # Print to stderr to avoid breaking JSON output on stdout
         import sys
+
         print(
             f"VocabularyManager: Initialized with {len(self._keyword_map)} unique keywords.",
-            file=sys.stderr
+            file=sys.stderr,
         )
 
     def analyze_text(self, text: str) -> Tuple[Coordinates, int]: