diff --git a/spateo/digitization/grid.py b/spateo/digitization/grid.py
index 403b0340..41801124 100644
--- a/spateo/digitization/grid.py
+++ b/spateo/digitization/grid.py
@@ -23,7 +23,7 @@ def digitize(
     spatial_key: str = "spatial",
     dgl_layer_key: str = "digital_layer",
     dgl_column_key: str = "digital_column",
-    max_itr: int = 1e5,
+    max_itr: int = 1e6,
     lh: float = 1,
     hh: float = 100,
 ) -> None:
diff --git a/spateo/digitization/utils.py b/spateo/digitization/utils.py
index a8cb5d5e..d68ca690 100644
--- a/spateo/digitization/utils.py
+++ b/spateo/digitization/utils.py
@@ -469,8 +469,8 @@ def domain_heat_eqn_solver(
     edge_line_b: np.ndarray,
     field_border: np.ndarray,
     field_mask: np.ndarray,
-    max_err: float = 1e-5,
-    max_itr: float = 1e5,
+    max_err: float = 1e-20,
+    max_itr: float = 1e6,
     lh: float = 1,
     hh: float = 100,
 ) -> np.ndarray:
@@ -529,7 +529,7 @@ def digitize_general(
     adj_mtx: np.ndarray,
     boundary_lower: np.ndarray,
     boundary_upper: np.ndarray,
-    max_itr: int = 1e5,
+    max_itr: int = 1e6,
     lh: float = 1,
     hh: float = 100,
 ) -> np.ndarray: