diff --git a/pyproject.toml b/pyproject.toml
index ee020b2..56a7033 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,7 +21,7 @@ classifiers = [
     "Programming Language :: Python :: 3.13",
 ]
 dependencies = [
-    "hs2p[asap,cucim,openslide,sam2,vips]>=4.1.2",
+    "hs2p[asap,cucim,openslide,sam2,vips]>=4.2.0",
     "omegaconf",
     "matplotlib",
     "numpy<2",
@@ -88,7 +88,7 @@ fm = [
     "pandas",
     "pillow",
     "rich",
-    "hs2p[asap,cucim,openslide,sam2,vips]>=4.1.2",
+    "hs2p[asap,cucim,openslide,sam2,vips]>=4.2.0",
     "wandb",
     "torch>=2.3,<2.8",
     "torchvision>=0.18.0",
diff --git a/slide2vec/runtime/tiling.py b/slide2vec/runtime/tiling.py
index 818ef79..6d93020 100644
--- a/slide2vec/runtime/tiling.py
+++ b/slide2vec/runtime/tiling.py
@@ -46,9 +46,10 @@ def build_hs2p_configs(
         if is_hierarchical_preprocessing(preprocessing)
         else preprocessing.requested_tile_size_px
     )
-    # Reuse hs2p's tiling-config resolver so the derived tissue_threshold comes from
-    # masks.min_coverage.tissue (the single source of truth) and independent_sampling
-    # is threaded consistently. The resolver reads attributes, so wrap the masks dict.
+    # Reuse hs2p's tiling-config resolver so the resolved min_coverage map comes from
+    # masks.min_coverage (the single source of truth; min_coverage["tissue"] is the tissue
+    # threshold) and independent_sampling is threaded consistently. The resolver reads
+    # attributes, so wrap the masks dict.
     tiling_adapter = SimpleNamespace(
         tiling=SimpleNamespace(
             masks=SimpleNamespace(**dict(preprocessing.masks)),
diff --git a/tests/test_regression_core.py b/tests/test_regression_core.py
index 1637db8..40874ea 100644
--- a/tests/test_regression_core.py
+++ b/tests/test_regression_core.py
@@ -700,7 +700,7 @@ def test_masks_min_coverage_tissue_drives_derived_tiling_threshold():
 
     tiling_cfg = build_hs2p_configs(preprocessing)[0]
 
-    assert tiling_cfg.tissue_threshold == pytest.approx(0.37)
+    assert tiling_cfg.min_coverage["tissue"] == pytest.approx(0.37)
     assert tiling_cfg.independent_sampling is False
 
 
diff --git a/tests/test_regression_inference.py b/tests/test_regression_inference.py
index 295474c..5398cbb 100644
--- a/tests/test_regression_inference.py
+++ b/tests/test_regression_inference.py
@@ -2498,7 +2498,7 @@ def test_build_hs2p_configs_constructs_preview_config():
     ) = runtime_tiling.build_hs2p_configs(preprocessing)
 
     assert tiling_cfg.backend == "asap"
-    assert tiling_cfg.tissue_threshold == pytest.approx(0.1)  # derived from masks.min_coverage.tissue
+    assert tiling_cfg.min_coverage["tissue"] == pytest.approx(0.1)  # resolved from masks.min_coverage.tissue
     assert segmentation_cfg.downsample == 64
     assert segmentation_cfg.method == "hsv"
     assert filtering_cfg.ref_tile_size == 224