diff --git a/library/hatomap.py b/library/hatomap.py
index 86a7b48266..7772f7029f 100644
--- a/library/hatomap.py
+++ b/library/hatomap.py
@@ -220,6 +220,7 @@ def request(self, bbox: WebMercatorPixelBBox) -> np.ndarray:
 
 @dataclass
 class Layer(metaclass=ABCMeta):
+
     @abstractmethod
     def get_image(self, bbox: WebMercatorPixelBBox) -> np.ndarray:
         pass