diff --git a/jass/server.py b/jass/server.py
index 44ee25f3bc72dd096885f08dd1991b2669361f4f..12473e650e94998a41555413ead91334840ce3c1 100644
--- a/jass/server.py
+++ b/jass/server.py
@@ -55,7 +55,7 @@ async def read_index():
 @app.get("/api/tables", response_model=List[str])
 def inittable_list():
     """List initTables"""
-    for filename in os.listdir( config["DATA_DIR"] ):
+    for filename in os.listdir(config["DATA_DIR"]):
         if filename.endswith(".hdf5") and "worktable" not in filename:
             yield filename