diff --git a/mesh.py b/mesh.py
index 2b53fde..f8c4d5b 100644
--- a/mesh.py
+++ b/mesh.py
@@ -229,13 +229,13 @@ def elastic_mesh_3d(
     pad_pos = list(pad_neg)
     for dim in direction[::-1]:  # zyx
       if dim == -1:
-        sel1.append(np.s_[:-1])
-        sel2.append(np.s_[1:])
+        sel1.append(np.s_[:-1])  # pyrefly: ignore[bad-argument-type]
+        sel2.append(np.s_[1:])  # pyrefly: ignore[bad-argument-type]
         pad_pos.append((0, 1))
         pad_neg.append((1, 0))
       elif dim == 1:
-        sel1.append(np.s_[1:])
-        sel2.append(np.s_[:-1])
+        sel1.append(np.s_[1:])  # pyrefly: ignore[bad-argument-type]
+        sel2.append(np.s_[:-1])  # pyrefly: ignore[bad-argument-type]
         pad_pos.append((1, 0))
         pad_neg.append((0, 1))
       elif dim == 0:
diff --git a/stitch_elastic.py b/stitch_elastic.py
index 3140a7d..c929110 100644
--- a/stitch_elastic.py
+++ b/stitch_elastic.py
@@ -254,11 +254,11 @@ def compute_flow_map(
       post_sel[1 - axis] = np.s_[:overlap]
 
       if ortho_offset > 0:  # post is shifted down relative to pre
-        pre_sel[axis] = np.s_[ortho_offset:]
-        post_sel[axis] = np.s_[:-ortho_offset]
+        pre_sel[axis] = np.s_[ortho_offset:]  # pyrefly: ignore[unsupported-operation]
+        post_sel[axis] = np.s_[:-ortho_offset]  # pyrefly: ignore[unsupported-operation]
       elif ortho_offset < 0:  # post is shifted up relative to pre
-        pre_sel[axis] = np.s_[:ortho_offset]
-        post_sel[axis] = np.s_[-ortho_offset:]
+        pre_sel[axis] = np.s_[:ortho_offset]  # pyrefly: ignore[unsupported-operation]
+        post_sel[axis] = np.s_[-ortho_offset:]  # pyrefly: ignore[unsupported-operation]
 
       pre = pre[tuple(pre_sel)]
       post = post[tuple(post_sel)]