diff --git a/reasoning_gym/graphs/largest_island.py b/reasoning_gym/graphs/largest_island.py
index 364d2687..ee2615e7 100644
--- a/reasoning_gym/graphs/largest_island.py
+++ b/reasoning_gym/graphs/largest_island.py
@@ -31,8 +31,12 @@ class LargestIslandConfig:
 
     rows: int = 10  # Number of rows in the grid
     cols: int = 10  # Number of columns in the grid
-    max_num_islands: int = 5  # Maximum number of islands (actual max might be smaller due to merging of islands during random walk)
-    max_island_size: int = 10  # Maximum size of an island (actual max might be larger due to merging of islands during random walk)
+    max_num_islands: int = (
+        5  # Maximum number of islands (actual max might be smaller due to merging of islands during random walk)
+    )
+    max_island_size: int = (
+        10  # Maximum size of an island (actual max might be larger due to merging of islands during random walk)
+    )
 
     size: int = 500  # Virtual dataset size
     seed: Optional[int] = None