diff --git a/surya/common/polygon.py b/surya/common/polygon.py
index 2a8c3a9b..53af4b1e 100644
--- a/surya/common/polygon.py
+++ b/surya/common/polygon.py
@@ -47,6 +47,7 @@ def area(self):
         return self.width * self.height
 
     @computed_field
+    @property
     def bbox(self) -> List[float]:
         x_coords = [point[0] for point in self.polygon]
         y_coords = [point[1] for point in self.polygon]
@@ -131,4 +132,4 @@ def shift(self, x_shift: float | None = None, y_shift: float | None = None):
                 corner[0] += x_shift
         if y_shift is not None:
             for corner in self.polygon:
-                corner[1] += y_shift
\ No newline at end of file
+                corner[1] += y_shift